mensa 365 brain puzzlers page-a-day calendar 2025: word puzzles, logic challenges, number problems, and more

Here’s the perfect calendar for people who love to start their day with a challenge. A lively mix of word puzzles, number problems, logic quandaries, and other cranial conundrums, this is the only calendar with puzzles so tough they’re sanctioned by Mensa(R), the internationally famous high-IQ society. Test your anagramming skills with Daisy Chain. Stretch your brain with binary numbers in Bits and Bytes. Solve for ciphers on Catching a Code. And don’t worry if you can’t solve one: Answers are printed on the reverse of each page.​
Printed on responsibly sourced paper and 100% recyclable.

Fraser Simpson is a high school mathematics teacher and puzzle constructor living in Toronto. He specializes in cryptic crosswords, has written several books of puzzles, and is a proud member of the National Puzzlers’ League.