Online Course Discussion Forum
2021 8 Week Prep Course for the AMC 10 Question 1
How I solved it was I looked at each exponent of 23 and tried to find a pattern but I would assume that would be too time-consuming on the actual AMC.
I'm also struggling with this problem. I can't seem to find a pattern by looking at the powers of 23 mod 100, or figure out how to use Euler's Theorem. I've tried putting in 100 and 10 for n and 23 for a but I can't figure out how to get the 2323 into the exponent. I'm not really familiar with this theorem and how to use it, so do you have any hints?