Question

Find the units digit of (867)^5309.Please show me how to do.

Answer 1

Could you please help me without calculator

Answer 2

please show me the steps

Answer 3

Do you know modular arithmetic?

Answer 4

no

Answer 5

hmm....then you need to be a little clever and observant. My suggestion is to check the units digits of:\[7^1,7^2,7^3,7^4,7^5,7^6\]and see if you can spot a pattern.

Answer 6

this problem is from 8th grade math tournament .without calculator.

Answer 7

i need help

Answer 8

try my suggestion.

Answer 9

okay .thanks