The integer n is equal to k^2 for some integer k. If n is divisible by 24 and by 10, what is the smallest possible positive value of n ?

# Win a Math Guide if you’re the first to get this challenge question right

It’s been a long time since I’ve done one of these, but I’ve been itching to give away a Math Guide for a while, and I woke up with this question in my head, so I figured I’d let ‘er rip. Full contest rules are here, but the important rules are below: You must live in (more…)

# Are you a smooth operator? Prove it with this Numbers and Operations quiz.

How’s everyone else doing on this quiz?