Spot-the-Error Game
Zol's Math Blunder Three sums are right. One is wrong. Go.
Zol's Math Blunder is a speed game you play in your browser — each round flashes up four equations where one is quietly wrong, and you race to tap the blunder before the clock winds down.
The rules
- Every flip shows four equations. Three are true; exactly one is false.
- Tap the false one. A correct tap flashes green, a wrong tap flashes red and shows you the real blunder, then the next flip slides in.
- You play ten flips a round, and your score is all about speed — the faster you catch each blunder, the more it's worth.
- The wrong answer is always off by a small, believable amount, never wildly out, so you actually have to check.
Pick your maths
- Easy — addition and subtraction.
- Medium — multiplication and division.
- Hard — order of operations, where you have to do the multiply before the add to spot the fake.
- Zolified — six cards instead of four, and it's not enough to tap the blunder: you have to type its correct answer too, with the clock never stopping.
It's mental arithmetic under a stopwatch. Hesitation is the only real mistake.
Three ways to play
The Daily gives everyone the same ten flips. Free Play is unlimited rounds at any difficulty. And Versus hands you and a friend the identical round — the higher, faster score wins.
Play it
Play Zol's Math Blunder 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 against-the-clock play: Zol's Equation, guess a hidden sum, Zol's Garage, sort traffic on the fly, or Zol's Putt, a round of browser mini-golf.