Squaring Numbers ending in 5

Squaring Numbers ending in 5
To square numbers ending in 5 like 15, 25, 35, 45....you know square of 5 is 5 x 5 = 25, you can use this for speedy calculation. Now to the technique let me explain with example

1^st example 15²

step 1 : Separate digit 5 from the number 15 then the remaining digit is 1
step 2 : add 1 to the remaining digit(s) here
              1 +1 = 2
step 3 : Multiply the number from step 1 and step 2
              1 x 2 = 2
step 4 : write 5² ie 25 after the result of step 3 ie 225
              thus 15²  = 225

2^nd example 95²

step1 : seperating 5 the remainng digit is 9

step2 : 9 +1 =10

step3 : 9 x 10 = 90

step4 : 95²=9025