How it Works › Forums › Advanced Problems (AMC 8 Problems 20-25 and beyond) › Unique Properties of Integers Advanced Problems › Reply To: Unique Properties of Integers Advanced Problems
I don’t really understand #4.
p and q are primes, and p+q = 10^1234 +1. However, 10^1234+1 is odd, so it must be an even number + odd number. The only even prime is 2, so the only possible pair would be if p or q = 2, right?