Published on March 27th, 2010 In category Division and Multiplication tricks | Education | Maths

Search Similar Topic: , , ;

How to square two digit number starting from 5

Sqaure Numbers easily

You can easily do the square of two digit number starting with 5 using this rule.

Suppose you have a number of the format 5x to be square for example say 54. Then it can be formed mentally using as follows:

  1. First do X + 25  – then in our example it will be 4 + 25 = 29
  2. The do the X2 – In our example it will 42 = 16
  3. Assemble the two results as follows – 2916

If you liked my contribution, please donate or click on any of advt. a little that will be generated will all be donated for noble cause. [paypal-donation] [ad#Textads-BetPost]