Question

i know the answer plzz give me the explanation as soon as possible plssss​

Answer 1

HEY MATE!

HERE IS YOUR ANSWER:

Since the square of 9 and 1 is 1 . So, the one's place while squaring the number will only get unit's place as 1 if the original number had 9 and 1 in its place.

HOPE IT HELPED ^_^

Answer 2

The numbers who’s squares end with 1 are 9 and 1. This means that the numbers having 1 or 9 at their ends will have 1 at the ones place while squaring them.

SOLUTION:
We know,
Only numbers who’s squares end with 1 are 9 & 1.
Therefore, the numbers that will have 1 at their ends place while squaring are:
11, 49, 51, 79 and 81.