Question

what will be the unit digit of the square of the following number 81 B 272 C 799 D 96980​

Answer 1

$1)\: \sqrt{81}$

$= 9$

$2) \: \sqrt{272}$

$= 16.49$

$3) \: \sqrt{799}$

$= 28.2$

$4) \sqrt{96980}$

$= 311.41$