Tip#1 : Square a number ending with 5

Tip#1 : How to Square a number ending with 5

Let us take number 65 and we need to find a square of the same
Time Limit: 5 sec

1. Take out 5 out of the number i.e. we are left with 6
2. Take the next number of 6, which is 7
3. Now Multiply 6 with its next number i.e. 6 x 7 = 42
4. 5 square is 25
5. Now append 42 with 25 => 4225 (Four thousand and two hundred twenty five) 

Hope this tip will help you do the calculation simple.

want to try yourself: 

• Find square of 75 
• Find square of 125
• Find square of 105
• Find square of 45

ANSWERS below (scroll down)

Answers

75 square : 7 multiply with its next number and append 25 : (7x8 and append 25) : 5625

125 square : 12 multiply with its next number and append 25 : (12x13 and append 25) : 15625

105 square : 10 multiply with its next number and append 25 : (10x11 and append 25) : 11025

45 square : 4 multiply with its next number and append 25 : (4x5 and append 25) : 2025