If x is a positive integer, what is one possible value of the unit digit 103^2x after it has been multiplied out?

Question

 I dont know how to solve the problem

Answer 1

It's asking you to pick a value for x that's a positive integer.

The simplest answer would be to make x = 1. It's the lowest possible positive integer.

2 * 1 = 2

 

That leaves us with 103², or 103 * 103

If you multiply that out, you will get a possible answer to your problem.