SOLUTION: If n is a positive integer, which of the following cannot be the units digit of 7^n? a) 1 b) 3 c) 5 d) 7 e) 9

Algebra ->  Customizable Word Problem Solvers  -> Numbers -> SOLUTION: If n is a positive integer, which of the following cannot be the units digit of 7^n? a) 1 b) 3 c) 5 d) 7 e) 9       Log On