2025 Pay Calenmensa 365 Brain Puzzlers Page-A-Day Calendar 2025. 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.

A lively mix of word puzzles, number problems, logic quandaries, 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.