Four expressions, one target. Spot the one that lands exactly.
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You are shown a target number and four candidate expressions. Exactly one of them evaluates to the target. The trick is not to compute all four — it is to eliminate. Check the last digit, check whether the result should be odd or even, check rough size. Most rounds can be solved without finishing a single full calculation.
That habit — estimating first, computing second — is the single most useful mental arithmetic skill there is, and it is exactly what this game drills.
This version: Larger numbers, tighter margins. Your best score is saved in this browser, so you can come back and try to beat it. Nothing is uploaded and no sign-up is needed.
No, and you will be faster if you do not. Use the last digit and rough size to rule out two or three options immediately, then verify only the survivor.
There is no per-question limit. Your total time is recorded so you can try to beat it, but accuracy matters more than speed in the scoring.
Start with Junior even if you are confident. The elimination habit is easier to learn on small numbers, and it transfers directly to the harder levels.