Question

If N is a perfect square and ends with the digit 9, then what will be the digit in the units place of N−−√?

Answer 1

Step-by-step explanation:

Answer

Correct option is

A

3 or 7

Only those numbers, when squared will have 9 at their unit place are 3 and 7.

Because 3×3 = 9

and 7×7 = 9

Hence, Option A is correct answer.

Answer 2

Answer: 3 and 7

Step-by-step explanation:

Answer

Correct option is

A

3 or 7

Only those numbers, when squared will have 9 at their unit place are 3 and 7.

Because 3×3 = 9

and 7×7 = 9

Hence, Option A is correct answer.