24-Point Solver and Game — Every Solution to Make 24

A complete 24-point toolkit for the classic Chinese arithmetic puzzle. The solver mode takes any 4 numbers from 1 to 13, enumerates all 4! × 5 × 4³ = 7,680 combinations of operand orderings, parenthesisation shapes, and operator picks, and lists every distinct expression that evaluates to exactly 24. Equivalent solutions are merged via canonical form, so (1 + 2) + 3 + 4 counts once instead of six times. Computation finishes in under 50 ms in any modern browser and there is no server round-trip. The game mode deals a random 4-card hand each round, lets you type an expression directly with +, −, ×, ÷ and parentheses, and validates it on the spot — making sure every card is used exactly once and the result equals 24. A live timer, score, and best-streak counter turn it into a quick mental warm-up. Stuck? Tap Hint to reveal one solution, or Give up to see all of them. A curated showcase of famously hard hands — 1 5 5 5, 3 3 8 8, 4 4 7 7 — opens directly in the solver so you can study the classics. Everything runs locally; nothing leaves your device.