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Number Puzzles

Chance Challenge

Two possibilities. Which one has the better odds?

Preparing your challenge…

Five untimed puzzles. Daily progress and personal bests save in this browser. Practice is unlimited. Hints reduce the round score by 15 points; a revealed solution earns 0. No leaderboard or online opponent.

How to play Chance Challenge

Compare two events. Dice are fair six-sided dice, coin flips are independent and fair, and a bag draw chooses each item with equal probability. Select Left, Equal or Right.

Choose Daily challenge for today’s shared set, or a practice level for a fresh set. Daily difficulty increases over five rounds. You may retry an incorrect answer; each incorrect check reduces that round’s score by 10. Hints cost 15. Reveal gives the worked solution for 0 points. Reloading resumes your daily round.