Zol's Equation Guess the hidden sum.

The rules

• There's a hidden equation, like 12 + 7 = 19. You have six guesses to find it.
• Every guess must itself be a true equation — the maths has to actually work.
• Each tile then tells you how close you are: green is the right symbol in the right spot, yellow is the right symbol in the wrong spot, grey means it isn't used.
• The equals sign can sit anywhere, and rearranging a sum that still adds up counts as correct — so 3 + 5 and 5 + 3 are the same answer.

Pick your length

• Easy — a short seven-character equation.
• Medium — eight characters.
• Hard — nine, with more room for multiplication and division.
• Zolified — the long one, but the clues collapse so you're only told a symbol is present, never where, and a timer reveals one correct tile — at a rising cost — if you stall.

A hint can hand you a correct tile when you're stuck, twice per game, for a small cost.

Every wrong guess still has to be a real equation — so even your mistakes teach you something.

Three ways to play

The Daily is one shared equation for everyone. Free Play is unlimited rounds at any length. And Versus hands you and a friend the same equation — the higher score wins.

Play it

Play Zol's Equation in your browser — nothing to download. Creating an account is free, and new players get a 30-day preview with full access to every game in the catalogue. After the preview, a rotating set of games is free to play each day.

More numbers to chew on: Zol's Math Path, build a route to a target, Zol's Math Blunder, spot the wrong sum fast, or Zol's Suds, a speed sudoku.