Fourfold 24
Fourfold 24 is a calm exact-arithmetic puzzle: combine four number tiles exactly once with +, -, x, and / until one value equals 24. Daily serves a deterministic four-puzzle Quartet, while Practice offers difficulty-selectable replay without countdown pressure.
How to play
Combine the four starting number tiles until one exact value remains. Each move chooses a first value, one of +, -, x, or /, and a second value; those two values are consumed and replaced by the exact result. Use all four originals exactly once and finish on 24. Daily serves a four-puzzle Quartet, while Practice offers Starter, Standard, Tricky, and Expert puzzles.
Controls
Tips for this game
- Subtraction and division depend on order, so check which tile is first before committing a move.
- Zero, negative, and fractional intermediate values are legal, but division by zero is not. Daily always has at least one all-integer solution; forced-fraction puzzles appear only in Expert Practice.
- Hints are progressive and never make a move for you. Using one marks that puzzle Assisted, while Undo and Reset by themselves do not.
Common questions
Do I have to use every starting number?
Yes. A successful puzzle consumes all four original tiles exactly once through three committed operations and leaves exactly one value equal to 24.
How is Daily different from Practice?
Daily is a deterministic four-puzzle Quartet for the scheduled date. Practice is unlimited and lets you choose Starter, Standard, Tricky, or Expert difficulty.