Speed Maths | Mental Maths | Math Tricks

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Square of a number ends with 5.:

Square of a number ends with 5. Speed Maths by Mdfaisal.com

Friends! This technique will help you in calculating squares of those numbers which ends with 5. :

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.

Slide3:

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. 25 12

Slide4:

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. 25 30

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