Question

What will be the unit digit of the squares of the following numbers?
(i) 81
step by step explanation ​

Answer 1

Answer:

Step-by-step explanation:

Unit digit of the square of number 81 is equal to 1.

81*81=6561

unit digit 1

ANSWERED BY GAUTHMATH

Answer 2

Answer:

1

Step-by-step explanation:

$0^{2} =0\\1^{2} =1\\2^{2} =4\\3^{2} =9\\4^{2} =16\\5^{2} =25\\6^{2} =36\\7^{2} =49\\8^{2} =64\\9^{2} =81$

As you can see the units digits while taking the square of the digits from 0 to 9.

So the units place of 81 is 1. Hence, the units place of its square is 1.