Jason (jcreed) wrote,
Jason
jcreed

Cute elementary math problem popped up on reddit:

Suppose you start at the origin of the plane, taking steps of distance exactly 1, with the restriction that both coordinates of every point you step on have to be rational. Which points can you get to?

I never in my life thought I'd actually have a reason to understand quadratic residues...
Tags: math, number theory, numbers
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