1. Square of a number ends with 5.
Speed Maths by Mdfaisal.com
2. Friends! This technique will help you in
calculating squares of those numbers which
ends with 5.
Like 25, 35, 45, 65, 85, 105, 125, 225 etc.
3. Let’s take for example
(35)2
Step 1 – First do the square of 5, ie. 25.
Step 2 – Now, multiply the number which is at ten’s place by its next
number. So, n x (n+1), i.e. 3 X 4 = 12.
Step 3 – So, our final answer become 1225.
2512
4. Similarly
(55)2
Step 1 – First do the square of 5, ie. 25.
Step 2 – Now, multiply the number which is at ten’s
place by its next number. So, n x (n+1), i.e 5 X 6= 30.
Step 3 – So, our final answer become 3025.
2530
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