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BrainTwister #69: Backward drops

BrainTwister #69: Backward drops

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BrainTwister #68: Another 2025 puzzle

BrainTwister #68: Another 2025 puzzle

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BrainTwister #65: Prime magic squares

BrainTwister #65: Prime magic squares

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WP9M9W hand drawing tic tac toe playing on the sand in summer beach

Mathematics

How breaking the rules of tic-tac-toe makes it way more fun

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BrainTwister #62: Particular patterns in piles

BrainTwister #62: Particular patterns in piles

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BrainTwister #60: Say what you see

BrainTwister #60: Say what you see

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2M9CJ0J 1940s SCATTERED PAGES FROM A ONE DAY AT A TIME FLIP DESK CALENDAR NUMBERS DAYS OF WEEK PATTERN PAPER TEXTURE - s10448 HAR001 HARS REPRESENTATION

Mathematics

This mathematical trick lets you work out the weekday of any date

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Puzzles #50-52: Can you crack these festive mathematical puzzles?

Puzzles #50-52: Can you crack these festive mathematical puzzles?

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EDINBURGH, SCOTLAND - JUNE 06: Taylor Swift fans queue outside Murrayfield stadium ahead of tomorrow nights concert on June 06, 2024 in Edinburgh, Scotland. Taylor Swift's Eras World Tour plays 15 dates across Scotland, Wales and England this June and August. Her fans, known as Swifties, had made the superstar $200 million in Eras merchandise sales as of November 2023. (Photo by Jeff J Mitchell/Getty Images)

Mathematics

How the maths of queuing can make lines more efficient

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BrainTwister #42: Persistence

BrainTwister #42: Persistence

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BrainTwister #39: Game of logic

BrainTwister #39: Game of logic

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3D illustration, brain shaped maze. Concept image of study and brain behavior.; Shutterstock ID 2177110871; purchase_order: -; job: -; client: -; other: -

BrainTwister #36: Prime generators

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