Question

What will be the unit digit of the squares of the

following numbers?

(i) 81​

Answer 1

Answer:

Since, 1 ends in 81 so it's unit digit will be 1.

Explanation:

Since,1²ends up having 1 as the digits at units place,So,81² will have 1 at units digit

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Answer 2

Answer:

1 or 9 because 1^1=1 and 9^9=81

Step-by-step explanation:

the unit digits for no. are

squares unit no.

1 1, 9

4 2, 8

5 5

6 4, 6

9 3, 7

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