GK Math 1001 Shortcut Tricks in hindi 2020 Latest Part 11

GK & Math Shortcut Tricks in hindi 2020 Latest 

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1. Part 1
2. Part 2
3. Part 3
4. Part 4
5. Part 5
6. Part 6
7. Part 7
8. Part 8
9. Part 9
10. Part 10
11. Part 11

PART-11

Math Tricks: Divisibility of a number by 10 shortcut tricks

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Math Tricks: Divisibility of a number by 10 shortcut tricks
The number is divisible by 10 if the number is end with Zero then the number divisible by 10.
Example: 4790/10 = 479 The numbers are end with Zero that why it is divisible by 10.
Example: 1250/10 = 125 The numbers are end with Zero that why it is divisible by 10.
Example: 336650/10 = 33665 The numbers are end with Zero that why it is divisible by 10.
Example: 2563140/10 = 256314 The numbers are end with Zero that why it is divisible by 10.
Example: 14587930/10= 1458793 The numbers are end with Zero that why it is divisible by 10.
Example: 587985460/10= 58798546 The numbers are end with Zero that why it is divisible by 10.
Example: 85264768510/10= 8526476851 The numbers are end with Zero that why it is divisible by 10.
Example: 215487896310/10= 21548789631 The numbers are end with Zero that why it is divisible by 10.
Example: 4587921545950/10= 458792154595 The numbers are end with Zero that why it is divisible by 10.
Note: So Before going to divisible by 10 any number, first check the condition of end with Single Zero digit is divisible by 10 .Than numbers is divisible by 10.

Math Tricks: Divisibility of a number by 11 shortcut tricks

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Math Tricks: Divisibility of a number by 11 shortcut tricks
Using 11 a number is divisible if difference sum of Even places and sum of odd places is Zero so divisible by 11.
Example: 1236431460/11= 112402860. (1+3+4+1+6)(odd places)-(2+6+3+4+0)(Even places)=0 and sum of odd and Even digit is equal so the number is divisible by 11.
Example: 513678/11= 46698.(5+3+7)(odd places)-(1+6+8)(Even places)=0 and sum of odd and Even digit is equal so the number is divisible by 11.
Example: 874720/11= 79520. (8+4+2)(odd places)-(7+7+0)(Even places)=0 and sum of odd and Even digit is equal so the number is divisible by 11.
Example: 697972/11= 63452. (6+7+7)(odd places)-(9+9+2)(Even places)=0 and sum of odd and Even digit is equal so the number is divisible by 11.
Example: 7972813805/11= 724801255. (7+7+8+3+0)(odd places)-(9+2+1+8+5)(Even places)=0 and sum of odd and Even digit is equal so the number is divisible by 11.
Note: So Before going to divisible by 10 any number, first check the condition of sum of odd and Even digit is equal and difference sum of Even places and sum of odd places is Zero is divisible by 10 .Than numbers is divisible by 10.

Math Tricks: Divisibility of a number by 15 shortcut tricks

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Math Tricks: Divisibility of a number by 15 shortcut tricks
We can write 15 as (5×3) so if a number is divisible by 5 and 3 then the number is divisible by 15.
Example: 75 / 15= 5 because 75 is divisible by 5 and 3 .so the number is divisible by 15.
Example: 35445 / 15= 2363 because 75 is divisible by 5 and 3 .so the number is divisible by 15.
Example: 756555 / 15= 50437 because 75 is divisible by 5 and 3 .so the number is divisible by 15.
Example: 2034645 / 15= 135643 because 75 is divisible by 5 and 3 .so the number is divisible by 15.
Example: 59985465 / 15= 3999031because 75 is divisible by 5 and 3 .so the number is divisible by 15.
Note: So Before going to divisible by 15 any number, first check the condition of a number isdivisible by 5 and 3 is possible than divisible by 15 is possible. Than numbers is divisible by 15.

Math Tricks: SQUARE up to 50

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Math Tricks: SQUARE up to 50
SQUARE up to 50

12 = 1	112= 121	212=441
22 = 4	122 = 144	222=484
32 = 9	132 = 169	232=529
42 = 16	142 = 196	242=576
52 =25	152 =225	252=625
62 = 36	162 = 256	262=676
72 = 49	172 = 289	272=729
82 = 64	182 = 324	282=784
92 = 81	192 = 361	292=841
102= 100	202 = 400	302=900
312= 961	412=1681
322= 1024	422=1764
332= 1089	432=1849
342= 1156	442=1936
352= 1225	452=2025
362=1296	462=2116
372=1369	472=2209
382= 1444	482=2304
392= 1521	492=2401
402= 1600	502=2500

Math Tricks: Square and Square Root of two digit get using formula

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Math Tricks: Square and Square Root of two digit get using formula
Square and Square Root get using formula
Formula: (a+b)² = a²+2ab+b² i.e, (a / b)²= a² / 2ab / b²
we applied this formula to obtain the square of a number

Example 1:
( 57 )²
= ( 5 / 7 )²

Answer :
Apply formula of a²+2ab+b²
Consider,
57² = ?
A as 5
B as 7 (we break the number in two parts i.e, A as 5 and B as 7 and applied formula )
= 5² / 2 x 5 x 7 / 7²
= 25 / 2 x 5 x 7 / 49
a²= 25
b²= 49
2ab = 2 x 5 x 7 = 70
= 25 / 70 / 49
Step 1: Put down 9 carry 4
Step 2: add carry 4 to 70 = 74 put down 4 carry 7
Step 3: add carry 7 to 25 = 32 put down 32
and answer is 3249,
= 3249
All this do on your mind which will help in fast calculation to obtain the answer of Square and Square Root of a number.
we applied this formula to obtain the square of a number
This is similar to the above Example.

Example 2:

(69)²
= (6/9)²

Answer :
Consider A as 6, and B as 9.
= 6² / 2 x 6 x 9 / 9²
= 36 / 2 x 6 x 9 / 81 (we break the number in two parts i.e, A as 6 and B as 9 and applied formula )
a² = 36
b²= 81
2ab = 2 x 6 x 9 = 108
=36 / 108 / 81
Step1: put down 1 carry 8
Step2 : add 8 to 108 =116 then put down 6 carry 11
Step3 : and add 11 to 36 = 47 and put down 47
= so answer is 4761,
= 4761
Note: All this do on your mind which will help in fast calculation to obtain the answer of Square and Square Root of a number.

Math Tricks: Square and Square Root of three digit get using formula

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Math Tricks: Square and Square Root of three digit get using formula
Square and Square Root of three digit get using formula1
we applied this formula to obtain the square of three digit number
Example 1:
Square and Square Root of 114²
Answer :
Firstly we separate the 114 like this (11/4)²
then applied previous formula on it
=11² / 2x11x4 / 4²
=11² / 2x11x4 / 16
=121 / 88 / 16
=12996
we apply the formula a² + 2.a.b + b²
Step 1: note down 6 carry 1
Step 2: add carry 1 to 88 =  89, note down 9 carry 8.
Step 3: add carry 8 to 121 and note down 129
= 12996
Note: we can also separate 114 to find square like (1/14)²
Example 2:
Square and Square Root of 223²
Answer :
Firstly we separate the 223 like this(22/3)²
then applied previous formula on it
we apply the formula a² + 2.a.b + b²
= 22² + 2 x 22 x 3 + 3²
=484 / 132 / 9
= 49729
Step 1: note down 9
Step 2: note down 2 carry 13.
Step 3: add carry 13 to 4 = 17, note down 7
Step 4: add carry 1to 48 = 49 put down
= 49729
Note: All this do on your mind which will help in fast calculation to obtain the answer of Square and Square Root of a number.

Math Tricks: Square and Square Root of 100 base method

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Math Tricks: Square and Square Root of 100 base method
Square and Square Root of 100 base method
Example 1: 98²= ?
Answer :
Step 1: First we know that 98² is double of 98 that is = 98 x 98 = ?,
At first we count the number of less from 100. that is the above 98 is 2 less from 100.
Step2: Now we are going to multiply 2 x 2 = 4 and note down this 4 ( that are come from both less 98 x 98 from 100).
Step 2: put one Zero left from 4 and now subtract the less number is 2 from 98 that is = 96 and the answer is 9604.

Example 2: 96² = ?
Answer:
Step 1: First we know that 96² is double of 96 that is = 96 x 96 = ?,
At first we count the number of less from 100. that is the above 96 is 4 less from 100.
Step 2: Now we are going to multiply 4 x 4= 16 and note down this 16 ( that are come from both less 96 x 96 from 100).
Step 3: now subtract the less number is 4 from 96 that is = 92 and put down it
that is 9261
and the answer is 9216.

Math Tricks: Square and Square root a number ending in 6

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Math Tricks: Square and Square root a number ending in 6
Square and Square root a number ending in 6

Example 1:

76²
Step 1: put down 6
Step 2: Multiply 2 with (7 + 1) = 16 and add 16 +1 = 17.put down 7 and carry 1 .
Step 3: Multiply 7 with (7 + 1) = 56 + carry 1 = 57 put down 57
Answer is 5776

Example 2:
96²
Step 1:put down 6
Step 2:Multiply 2 with (9 + 1) = 20 and add 20 + 1 = 21.put down 1 and carry 2 .
Step 3:Multiply 9 with (9 + 1) = 90 + carry 2 = 92 put down 92
Answer is 9216

Example 3:
36²
Step 1: put down 6
Step 2: Multiply 2 with (3 + 1) = 8 and add 8 +1 = 9.put down 9.
Step 3: Multiply 3 with (3 + 1) = 12 put down 12
Answer is 1296

Example 4:
56²
Step 1: put down 6
Step 2: Multiply 2 with (5 + 1) = 12 and add 12 +1 = 13.put down 3 and carry 1 .
Step 3: Multiply 5 with (5 + 1) = 30 + carry 1 = 31 put down 31
Answer is 3136

Math Tricks: CUBE up to 30

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Math Tricks: CUBE up to 30

13=1	113=1331	213=9261
23=8	123=1728	223=10648
33=27	133=2197	233=12167
43=64	143=2744	243=13824
53=125	153=3375	253=15625
63=216	163=4096	263=17576
73=343	173=4913	273=19683
83=512	183=5832	283=21952
93=729	193=6859	293=24389
103=1000	203=8000	303=27000

Math Tricks: Find Five digit Cube and cube root Tricks

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Math Tricks: Find Five digit Cube and cube root Tricks
Need to remember 1 to 10 cube and this so easy for any one.Which will help in obtaining cube and cube root numbers.
1³=1
2³=8
3³=27
4³=64
5³=125
6³=216
7³=343
8³=512
9³=729
10³=1000

Math Tricks: Find Five digit Cube and cube root Tricks

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Math Tricks: Find Five digit Cube and cube root Tricks
Need to remember 1 to 10 cube and this so easy for any one.

Example 1:
³√13824 = ?
Answer:
Step 1: Last digit of cube number from right side is 4 that we consider 64 = 4³ we put down 4. Then
Step 2: Take the number whose cube is nearest to 13.
That is 13 is nearest to 2³ and 3³ we take small one cube digit that is 2.³√13824
So the answer is 24. 

Example 2:
³√15625= ?
Answer:
Step 1: Last digit of cube number from right side is 5 that we consider 125 = 5³ we put down 5. Then
Step 2: Take the number whose cube is nearest to 15.That is 15 is nearest to 2³ and 3³ we take small one cube digit that is 2.
So the answer is 25.

Example 3:
³√42875= ?
Answer:
Step 1: Last digit of cube number from right side is 5 that we consider 125 = 5³ we put down 5. Then
Step 2: Take the number whose cube is nearest to 42.That is 42 is nearest to 3³ and 4³ we take small one cube digit that is 3.
So the answer is 35.

Math Tricks: Find Six digit Cube and cube root Tricks

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Math Tricks: Find Six digit Cube and cube root Tricks
Need to remember 1 to 10 cube and this so easy for any one.Which will help in obtaining cube and cube root numbers.
1³=1
2³=8
3³=27
4³=64
5³=125
6³=216
7³=343
8³=512
9³=729
10³=1000

Math Tricks: Find Six digit Cube and cube root Tricks

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Math Tricks: Find Six digit Cube and cube root Tricks
Need to remember 1 to 10 cube and this so easy for any one. 

Example 1:
³√166375 = ?
Answer:
Step 1: Last digit of cube number from right side is 5 that we consider 125 = 5³ we put down 5. Then
Step 2: Take the number whose cube is nearest to 166.That is 166 is nearest to 5³ and 6³ we take small one cube digit that is 5.
So the answer is 55.

Example 2:
³√185193
Answer:
Step 1: Last digit of cube number from right side is 3 that we consider 343 = 7³ we put down 7. Then
Step 2: Take the number whose cube is nearest to 185.That is 185 is nearest to 5³ and 6³ we take small one cube digit that is 5.
So the answer is 57.

Example 3:
³√274625
Answer:
Step 1: Last digit of cube number from right side is 5 that we consider 125 = 5³ we put down 5. Then
Step 2: Take the number whose cube is nearest to 274.That is 274 is nearest to 6³ and 7³ we take small one cube digit that is 6.
So the answer is 65.

Math Tricks: Find Seven digit Cube and cube root Tricks

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Math Tricks: Find Seven digit Cube and cube root Tricks
Need to remember 1 to 20 cube and this so easy for any one.Which will help in obtaining cube and cube root numbers.

13=1	113=1331
23=8	123=1728
33=27	133=2197
43=64	143=2744
53=125	153=3375
63=216	163=4096
73=343	173=4913
83=512	183=5832
93=729	193=6859
103=1000	203=8000

  

Math Tricks: Find Seven digit Cube and cube root Tricks

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Math Tricks: Find Seven digit Cube and cube root Tricks
Need to remember 1 to 20 cube and this so easy for any one.

Example 1:
³√3869893 = ? 
Answer:
Step 1: Last digit of cube number from right side is 3 that we consider 343 = 7³ we put down 7. Then
Step 2: Take the number whose cube is nearest to 3869.That is 3869 is nearest to 15³ and 16³ we take small one cube digit that is 15.
So the answer is 157.

Example 2:
³√1728000 = ?
Answer:
Step 1: Last digit of cube number from right side is 0 that we consider 1000 = 10³ we put down 0. Then
Step 2: Take the number whose cube is nearest to 1728.That is 1728 is nearest to 12³ and 13³ we take small one cube digit that is 12.
So the answer is 120.

Math Tricks: How to Square a Number Ending With 5 Within Seconds

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Math Tricks: How to Square a Number Ending With 5 Within Seconds
How to Square a Number Ending With 5 Within Seconds
Squaring a number ending in 5 is the easiest if you know the trick.
Number given to you can be a two digit number or three digit number or five or six digit number, 
it does'n t matter.
The same trick can be applied to find the square of any number ending in 5.
Let us now discuss the steps to follow
Step 1: Multiply the ten's digit of the given number with its immediate next number.This will be the 1st digit of the answer.
Step 2: Put 25 next to the result of step 1.
Logic behind putting 25 is that the number will always end with 5 and 5² is 25. 
You get the answer
Let us find squares of numbers ending in 5 using this trick 

Example 1:(35)²=?
Step 1: 3 is the ten's digit in the given number 35.
Immediate next number to 3 is 4.
Hence,by multiplying 3 & 4 we get 12(3x4=12).which is the 1st digit of the answer.
Step 2: Now putting 25 next to 12 we get the answer as 1225.
Answer: (35)²= 1225
Now you try to square 25,45,15,55,65,75,85,95 & see how quickly you can square.   

Example 2:(125)²=?
Step 1: 12 is the ten's digit in the given number 125.
Immediate next number to 12 is 13.
Hence,by multiplying 12 & 13 we get 156(12x13=156).which is the 1st digit of the answer.
[To multiply a 2digit by 2digit number when ten's digit of both numbers is 1 you can apply a trick to get your answer quickly.
1st digit =1
middle digit =add unit's place digit of both numbers(2+3=5)
unit's place digit=Multiply unit place digit of both numbers(2x3=6)]
Step 2: Now putting 25 next to 156 we get the answer as 15625.
Answer: (125)²= 15625
Now you try to square 105,115,135,145,155,165,175,185,195 & see how quickly you can square.

Math Tricks: Square any Number from(10-19)

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Math Tricks: Square any Number from(10-19)
Square any Number from(10-19)
Easiest method to find the square of any number between 10 and 19  
Step 1: First add the given number and the units digit.
Step 2: Then Square the unit's digit and put the number next to the result obtained in STEP 1.

Example 1: Find the square of 13 in 5 seconds
(13)² = ?
Step 1: 13 + 3 = 16_
Step 2: 3² = 9
put the result obtained in step 2 in step 1 we get
Answer: 169

Example 2: Find the square of 16 in 5 seconds
(16)² = ?
Step 1: 16 + 6 = 22_
Step 2: 6² = 36
put the result obtained in step 2 in step 1 as shown below
22_
 36
Answer: 256

Math Tricks: Square any Number from(20-29)

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Math Tricks: Square any Number from(20-29)
Square any Number from(20-29)
Easy way to mentally square any number from 20 to 29
Step 1: First add the given number and the unit's digit.
Step 2: Double the result obtained in step 1.
Step 3: Square the unit's digit of the number given in question and place it next to the result obtained in step 2.

Example 1: Find the square of 22 in 5 seconds
(22)²=?
Step 1: 22 + 2=24
Step 2: 24x2=48_
Step 3: 22=4
Now put the result obtained in step 3 in step 2,we get
Answer: 484

Math Tricks: Square any Number from(30-79)

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Math Tricks: Square any Number from(30-79)
Square any Number from(30-79)
It is always better to have some maths tricks handy when you are planning to take any arithmetic aptitude test either in the competitive exams such as Bank exams,CAT,MAT.
Another easy trick to find square of the numbers between 30 to 79 is to take a common base as 50 and see how far the number is from 50.This method works well when the number is very close to 50.
Easy way to find the square of  number from 30 to 79
Step 1: Find how many more or less the given number is from 50.
Step 2: Add the number to 25 if more than 50 or subtract the number from 25 if less than 50.
Step 3: Then find the square of the number added or subtracted and put next to the result arrived at in step 2.

Let us now apply the trick that we learnt in the example below

Example 1: Find the square of 52 in 5 seconds
(52)²=?
Step 1: 52-50=2
We find 52 is 2 more than 50
Step 2: Here we notice that the given number is more than 50 so we add 25 as follows
            25+2=27
Step 3: Now we find the square  of 2
           2²=4
putting the result obtained in step 3 next to the result obtained in step 2 after adding a 0 before it as it is a single digit,we get
           2704
Answer: (52)²=2704 

Math Tricks: Square any Number from(90-99)

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Math Tricks: Square any Number from(90-99)
Square any Number from(90-99)
This shortcut method is one of my favorite that I like to apply when I see a number such as 98 or 99 as all I need to know is how to subtract and square of numbers from 1 to 9.
Now lets go through the steps
Step 1: Assume 100 as base and find the difference between the number to be squared and 100.
Step 2: Subtract the difference you found in step 1 from the number to be squared to find tenth place digit.
Step 3: Square the difference and place it next to step 2.
Once you know the technique you can square any number from 90 to 99 mentally.
Let us see few examples to understand better

Example 1: 98²=?
Step 1: Assuming 100 as base, we shall find the difference
100-98=2
We get the difference as 2
Step 2: Subtracting the difference(2) from the number to be squared(98) we get,
98-2=96
96 is the tenth place digit
Step 3: Squaring the difference we found in step 1 we get
2²=4
4 is the Unit place digit.
98²=9604

Example 2: 99²=?
Step 1: Assuming 100 as base, we shall find the difference between the number to be squared(99) and 100.
100-99=1
We get the difference as 1
Step 2: Subtracting the difference(2) from the number to be squared(98) we get,
99-1=98
98 is the tenth place digit
Step 3: Squaring the difference we found in step 1 we get
1²=1
1 is the Unit place digit.
99²=9801

Math Tricks: Square any Number from(100-120)

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Math Tricks: Square any Number from(100-120)
Square any Number from(100-120)
Base method is popularly used to find square of numbers when the numbers are close to a base.By choosing the right base you will arrive at your answer quickly.
So whenever you see 102,101,112,106 it should strike to you immediately.
Hey! this is quite close to 100 so let me take the base as 100 and see if I can get the answer soon.
Here we shall discuss the shortcut method to square any number from 100 to 120 using the base method.
Lets go through the steps now
Step 1: Take 100 as base and see how far the number is from 100.
Add the given number and its deviation.
Lets say you need to square 102.
Here you can notice that the number is 2 more than 100.
Adding the given number(102) and its deviation(2)
we get,
102+2=104
Step 2: Square the deviation(2)and place it next to the result obtained in step 1.
Squaring we get,
2²=4
Answer: 10404

Math Tricks: Shortcut to find cuberoot of any 5 or 6 digit number

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Math Tricks: Shortcut to find cuberoot of any 5 or 6 digit number
Shortcut to find cube root is especially helpful in competitive exams where every second counts.
By using this method you can save a lot of time and also get accurate results.
Shortcut to mentally find the cube root of any 5 or 6 digit number
Step 1: Find the cube root of the last digit.

Points to be remembered while using this method.
(1)If the last digit is 8 then cube root will be 2.
(2)If the last digit is 2 then cube root will be 8.
(3)If the last digit is 7 then cube root will be 3.
(4)If the last digit is 3 then cube root will be 7.
(5)If the last digit is any other digit other than 2,8,3,7 then put the same number.
From this step you will get the unit's or one's place digit.
To find the tenth place digit you need to follow the below steps.
Step 2: Strike out the last 3 digits of the given number.
Step 3: find the nearest cube of the remaining number.
Step 4: find the cube root of the nearest cube which will give you ten's place digit.
List of cubes to be memorized
1³=1               4³=64              7³=343
2³=8               5³=125            8³=512
3³=27             6³=216            9³=729
NOTE: Shortcut to find cuberoot of any 5 or 6 digit number is applicable only if the given number is a perfect cube.
You can verify whether the given number is a perfect cube or not by using the Prime Factorization Method. If you are not familiar with this method check it here.
Let me explain this with an example to make things more clear and easy to understand.
So lets say we want to find the cube root of a 6 digit number 15746

Example 1: Find the cube root of 157464 in 5 seconds.
                ?157464=?
Step 1: First we need to find the cube root of the last digit of the given number.
Here the last digit is 4 . 4 is a number other than 2, 8, 3, 7 hence we put the number as it is.
We get our one's place digit as 4.
Now to get tenth place digit 
Step 2: We need to strike the last 3 digits of the given number.
In this example the last 3 digits are 464 which we will strike off as shown below
157464
Step 3: We need to find the nearest cube to the remaining number(157)
We find that 125 is the nearest cube to 157.
Step 4: We need to find the cube root of the nearest cube(125)
         ?125=5
         From this step we get our ten's place digit as 5.
         From step 1 and step 4 we get the 
         ?157464=54
Answer: 54

Math Tricks: Shortcut to find square-root of any number

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Math Tricks: Shortcut to find square-root of any number
In every bank exam you are asked either to find the square root or cube root of a number. By knowing the shortcut to find the square root of a number, you will be able to find out the square root of any number within seconds.  

Now lets go through the steps...
Step 1: First of all group the number in pairs of 2 starting from the right.
Step 2: To get the ten’s place digit, Find the nearest square (equivalent or greater than or less than) to the first grouped pair from left and put the square root of the square.
Step 3: To get the unit’s place digit of the square root
Remember the following

If number ends in 
Unit’s place digit of the square root 
1
1 or 9(10-1)
4
2 or 8(10-2)
9
3 or 7(10-3)
6
4or 6(10-4)
5
5
0
0
Lets see the logic behind this for a better understanding 
We know,
1²=1
2²=4
3²=9
4²=16
5²=25
6²=36
7²=49
8²=64
9²=81
10²=100
Now, observe the unit’s place digit of all the squares.
Do you find anything common?
We notice that,
Unit’s place digit of both 12 and 92 is 1.
Unit’s place digit of both 22 and 82 is 4
Unit’s place digit of both 32 and 72 is 9
Unit’s place digit of both 42 and 62 is 6.
Step 4: Multiply the ten’s place digit (found in step 1) with its consecutive number and compare the result obtained with the first pair of the original number from left.
Remember,
If first pair of the original number > Result obtained on multiplication then  select the greater number  out of the two numbers as the unit’s place digit of the square root.
If firstpair of the original number < the result obtained on multiplication,then select the lesser number out of the two numbers as the unit’s place digit of the square root.
Let us consider an example to get a better understanding of the method

Example 1: √784=?
Step 1: We start by grouping the numbers in pairs of two from right as follows
7 84
Step 2: To get the ten’s place digit,
We find that nearest square to first group (7) is 4 and √4=2
Therefore ten’s place digit=2
Step 3: To get the unit’s place digit,
We notice that the number ends with 4, So the unit’s place digit of the square root should be either 2 or 8(Refer table).
Step 4: Multiplying the ten’s place digit of the square root that we arrived at in step 1(2) and its consecutive number(3) we get,
2x3=6
ten’s place digit of original number > Multiplication result
7>6
So we need to select the greater number (8) as the unit’s place digit of the square root.
Unit's place digit =8
Answer: √784=28

GK TRICKS: For Competitive Exams

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GK Tricks: For Competitive Exams
For Competitive Exams
GK Tricks 01: Atomic Particle Discovered By
Trick : परमाणु मेँ उपस्थित राशियोँ के खोजकर्ता
ट्रिक = PEN=RTC

• Proton=Rutherford,
• Electron=Thomsan
• Newtron=Chadwick. 

GK Tricks 02: UNO permanent member of

Trick:  FRECA

• F = France
• R = Russia
• E = England
• C = China
• A = US 

GK Tricks 03: The four war won by Babur order
Trick: Pan khao chilla Ke gawo

• P = Panipat (1526),
• K = Khanwa (1527)
• C = Chanderi / Chanderi (1528)
• G = Skirt (1529)

GK Tricks 04: मुगल साम़ाजय़ के शासक क़़मानुसार 
Trick: बाहो मे आजा शाही आम

• बा- बाबर
• हो- हुमायु
• आ - अकबर
• जा - जंहागीर
• शाही - शाहंजहा
• आ - ओरंगजेब 

GK Tricks 05: जिवाणु से होने वाले प्रमुख रोग 
Trick: “ ‪पंडित_का_टिक_न्यु_है ” 

• 1. पं— प्लेग 
• 2. डि— डिपथिरिया
• 3. त— टायफाइड
• 4. का— काला खाँसी
• 5. टि— टिटनस
• 6. क— कुष्ट
• 7. न्यु— न्युमोनिया
• 8. है— हैजा 

GK Tricks 06: G-20 के सदस्य देशो का नाम है!
TRICK: GURUJI(गुरुजी) SITA(सीता) AB(अब) SSC FCI ME(में) जाँव करती है ।

• G-- Germany
• U-- USA
• R-- Russia
• U-- UKJ-- Japan
• I-- India
• S-- South Africa
• I-- Indonesia
• T-- Turkey
• A-- Australia
• A-- Argentina
• B-- Brazil
• S-- Saudi Arabia
• S-- South Korea
• C-- Canada
• F-- France
• C-- China
• I-- Italy
• M-- Mexico
• E-- European Union
• जाँव करती है -- silent words 

GK Tricks 07: चक्रवातों के नाम

• चक्रवात (Cyclone) ----------- हिन्द महासागर
• हरीकेन (Hurricane) --------- कैरिबियन द्वीप समूह
• टायफून (Typhoon) ---------- दक्षिण चीन सागर
• विली-विलीज (Willy-Willies)--- आस्ट्रेलिया
• टॉरनेडो (Tornadoes) --------- तटीय अमेरिका
• ट्विस्टर (Twister) ------------ स्थलीय अमेरिका 

GK Tricks 08: Mind Trick To Rember the Layers of Atmosphere
Mind Trick:: (( IMOST )) 

• T-troposphere
• S-statosphere
• o-ozonosphere
• M-mesosphere
• I-ionosphere 

GK Tricks 09: भारत की स्थल सीमा पर पड़ोसी देश
TRICK: "बचपन मेँ MBA किया

• ब-------बंग्लादेश---------(4,096KM)
• च-------चीन-------------(3,917KM)
• प-------पाकिस्तान-------(3,310KM)
• न-------नेपाल------------(1,752KM).
• मेँ-------(silent)
• M-------म्यामार----------(1,458KM)
• B--------भूटान-----------(587KM)
• A--------अफगानिस्तान--(80KM)
• किया---(silent). 

GK Tricks 10: प्रमुख ठंडी जलधाराऐं
Trick: {हम बोले ग्रीन बगुला क्यों केला FAK (फ़ेंक) रहा है}

• हम बो – हम्बोल्ट की धारा 
• ले – लेब्रोडोर की धारा
• ग्रीन – ग्रीनलैंड की धारा
• बगुला – बेंगुऐला की धारा
• क्यों – क्युराइल की धारा
• केला – कैलीफ़ोर्निया की धारा
• F - फ़ाकलैंड की धारा
• A - आखोस्टक की धारा
• K - कनारी की धारा

इस तरह आपको ठंडी जलधाराऐं याद हो जाऐंगी और बाकी बची हुई जलधाराऐं गरम होंगी !!