Question

Find the unit place digit in 71 x 72 x 73 x 74 x 76 x 77 x 78 x 79. *

Answer 1

Explanation:

1*2*3*4*6*7*8*9

the last digit is 6

1*2

2*3

6*4

24

4*6

24

4*7

28

8*8

64

4*9

36

6 is the answer