Question

what will be unit digit of square of 21​

Answer 1

Hence, the unit's digit of square of 1234 is 6. (vi) The number 26387 contains its unit's place digit 7. So, the square of 7 is 49. Hence, the unit's digit of the square of 26387 is 9.

Answer 2

Answer:

1

Explanation:

bcauz square of 21 = 441

and on unit place, there is 1