Spot the errors
Five equations are shown. Tap every equation that is wrong to slice it — there are always between one and three.
What it tests
Quick, accurate mental arithmetic and the order of operations: × and ÷ before + and −, brackets and powers first.
Common pitfalls
- Working left to right: 4 + 6 × 2 is 16, not 20
- Reading a square as × 2: 7² is 49, not 14
- Assuming there is exactly one wrong equation
Tip: Check every equation, even when you have already found one error — there can be up to three.
Live demo · try it