Isn’t it great, if you can calculate faster in competitive exams or in daily life? In competitive exams you need to solve more number of problems in less time. So, candidates, nowadays running behind the coaching centers for shortcuts. But it is absolutely useless if you don’t have conceptual clarity. Here is the speed math rule for Squaring Numbers ending with 5. Check other speed math rules here.

Give me any 2 digit number that ends in 5, and I’ll square it in my head! and will give you instant correct result.
452 = 2025
852 = 7225, etc.

There’s a quick way to Squaring Numbers ending with 5 : if the first digit is N and the second digit is 5, then the last 2 digits of the answer will be 25, and the preceding digits will be N*(N+1).

Practice Suggestions:

After knowing the trick, check how fast you can square such numbers in your head, but doing several examples.

This is speed math trick 1. Please check other speed math tricks here.

More examples:

Ex 1: (15)2 = 1x(1+1)|52 =2|25 =225
Ex 2: (25)2 = 2x(2+1)|52 =6|25 =625
Ex 3: (85)2 = 8x(9)|52 =72|25 =7225
Ex 4: (115)2 = 11x(12)|52 =132|25=13225
Ex 5: (225)2 = 22x(23)|52 =506|25=50625

General Representation:

(N5)2 = N(N+1)|25

Are you ready to play a brain game? Ok, that’s Equi Math for you. Click here to get the Android Game. This game will help in decision making in quick time. It is very easy at beginning and gets difficult on the higher levels. Try to reach as much higher level as possible. On game over, try again to improve your best. That way you will have quick solving skills.

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