One real-world problem a day. Six guesses.Next problem in —
—Today
—#1
—
Answer in —. Type a number, or use the keypad.
Your guesses narrow down where the answer must be.
Within 1%Within 5%Within 25%Further
How it plays
Same rules every day.
1 · GuessAny number
Work it out, or estimate. Big numbers work too: type 3e10 for 3 × 10¹⁰.
2 · Read the tilesColour and arrow
The colour says how close you are. The arrow says go higher or lower. The number line shows what's left.
3 · Learn the storyWhere it's from
Every problem comes from a real moment, and links to the Provolve page that goes deeper.