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r/mathriddles
130 words
A different prisoner hat problem
159 words
Divergence of a harmonic-ish sequence
155 words
Weekly puzzles 1: chess pieces
295 words
Integrating itself
226 words
Given n∈ℤ, how many integer solutions exist to x² + y² = n + z² ?
384 words
Stone Weighing Problem
433 words
Yay, even more geometry! Find the area of the shaded circles.
375 words
Pawn Structure challenge
315 words
Nifty basketball probability problem
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