Question

What is the digit at unit place of9n

Answer 1

     

The ones digit of the value of n (at left) and that of 9n (at right) are given below.

0 → 0

1 → 9

2 → 8

3 → 7

4 → 6

5 → 5

6 → 4

7 → 3

8 → 2

9 → 1

Also, we can say that,

the digit at unit place of 9n =  10 - (digit at unit place of n),  where n ≠ 0,

and if n = 0, then the digit at unit place of 9n = the digit at unit place of n.

Hope this helps. Plz mark it as the brainliest.

Thank you. :-))