How to play
Every day, everyone gets the same four numbers. Combine all four, using each exactly once, to make exactly 24.
Tap a number, tap an operator, tap a second number. They merge into one tile. Keep going until one tile remains. If it reads 24, you've solved it.
Why 24? It has more divisors than any smaller number (1, 2, 3, 4, 6, 8, 12, 24), so almost any four starting numbers can reach it.
Fractions along the way are shown exactly, never rounded. Undo steps back one merge, Reset starts the puzzle over.
Stars are about resets, not speed: solve with 0 resets for ★★★, 1–2 resets for ★★☆, 3 or more for ★☆☆. Undo is always free. Giving up scores no stars.