BrainTwister #107: Prime products By Christopher Dearlove Email Advertisement Sign up to our weekly newsletter Receive a weekly dose of discovery in your inbox. We'll also keep you up to date with Âé¶¹´«Ã½ events and special offers. Sign up More BrainTwisters Your weekly dose of logical and mathematical puzzling BrainTwister BrainTwister #122: Squares and cubes 15 April 2026 BrainTwister BrainTwister #121: Strike one 8 April 2026 BrainTwister BrainTwister #120: Wrong method, right answer 1 April 2026 See all BrainTwisters
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More BrainTwisters Your weekly dose of logical and mathematical puzzling BrainTwister BrainTwister #122: Squares and cubes 15 April 2026 BrainTwister BrainTwister #121: Strike one 8 April 2026 BrainTwister BrainTwister #120: Wrong method, right answer 1 April 2026 See all BrainTwisters