Question

If a square of a number ending with digit 4 then what will be the ones place digit of the number

Answer 1

It can be 2 or 8

As the square of 2 is 4, where one's digit or the unit digit is 4.

And the square of 8 is 64, where one's digit of the number is 4.

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Squares of numbers 1 to 10 are given below

1² = 1

2² = 4

3²=9

4² = 16

5² = 25

6² = 36

7² = 49

8² = 64

9² = 81

10² = 100

Hope it helps