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Finding Square of a Number with Unit's Place 5

What is the f...

Question

What is the first three digits in the square of 135?

A

182

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B

128

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C

821

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D

218

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Solution

The correct option is A 182
Since the number ends in 5, we can use the shortcut to get the square of 135.
The numbers in 135 before 5 is 13.
Multiply the number 1 greater than 13 to 13.
So, 13 x 14 = 182.
Thus 182 will be the first 3 digits in the square of 135.

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