Clues arrive one at a time — stamp out every number each clue rules out until a single suspect remains, then make the arrest.
A board of number suspects faces a stream of clues — greater than 40, even, digit sum of 9 — and children stamp out every number each clue rules out until exactly one suspect remains to arrest. Wrong stamps bounce back with an explanation using the live number, and the top levels move to a three-digit lineup with place-value clues. Deduction by elimination sharpens comparison, odd-and-even thinking, skip-counting and digit knowledge. Well suited to Grades 2–4.
A free, no-signup, no-ads math game for Grades 2–4 — practising odd-even, comparing-numbers, skip-counting, place-value, number-sense. Play in your browser on the KidsDoMath games hub or explore more Counting & Numbers games.
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What math does Number Detective practice? Number Detective practices Odd & Even Numbers, Comparing Numbers, Skip Counting, Place Value. A board of number suspects faces a stream of clues — greater than 40, even, digit sum of 9 — and children stamp out every number each clue rules out until exactly one suspect remains to arrest.
What grade is Number Detective for? Number Detective is built for Grades 2–4 (ages 7–10). It sits in the Counting & Numbers strand, and it ramps across 8 levels so younger or older players find their own pace.
How do you play Number Detective? Clues arrive one at a time — stamp out every number each clue rules out until a single suspect remains, then make the arrest.
Is Number Detective free to play? Yes. Number Detective is free, with no ads and no sign-up, and it runs in the browser on a phone, tablet or computer.