Question

what would be the possible ones digit of the square root of each of the following natural numbers 6561​

Answer 1

${\huge\fbox\pink{A}\fbox\blue{N}\fbox\purple{S}\fbox\green{W}\fbox\red{E}\fbox\orange{R}\fbox{}\fbox\gray{}}$

The possible unit digit of the square root of the number 6561 is 1 or 9.