Maths - Short Cut Trick for Squaring of Numbers
Shortcut 1:
Note: This trick works only with those numbers whose unit digit is 5 i.e 15,25,35,45,55 etc Example : 35 x 35 = ? Solution: This trick works as follows: square first digit of the number: 5 x 5 = 25 Now, multiply second digit of one of the number with (second digit + 1) of the other: 3 x (3 + 1) = 12 So the answer comes : 1225(joining second and first multiplication) Example : 45 x 45 = ? Solution: Square first digit of the number: 5 x 5 = 25 Now, multiply second digit of one of the number with (second digit + 1) of the other: 4 x (4 + 1) = 20 So the answer comes : 2025(joining second and first multiplication) |
|
Shortcut 2 :
Note - Squaring Number For numbers whose unit digit is not 5
Example :
13 x 13 = ?
Solution:
This trick works as follows:
Note - Squaring Number For numbers whose unit digit is not 5
Example :
13 x 13 = ?
Solution:
This trick works as follows:
To simplify the problem Just add the unit digit number(3 in this case) to the number(13): 13 + 3 = 16 Now, Subtract the unit digit number(3 in this case) to the number(13 in this case): 13 – 3 = 10 Now, multiply the numbers and add unit digit’s square to them: 16 x 13 + 32 = 169 is the answer!
Example :
98 x 98 = ?
Solution:
98 x 98 = ?
Solution:
Square of 98 would be 9600 + 04 = 9604