Multiples Rush

How to play & why it works

A grid of numbers, one instruction: tap every multiple of 6 (or 4, or 7…), then hit Check. Miss one or tap a non-multiple and the round lets you fix it — the selection is only right when it is exactly right.

Recognizing multiples is a different skill from producing them. Reciting 6, 12, 18 is easy; deciding quickly whether 42 is in the six family is what long division, fraction simplification and factoring actually demand. The multi-select format drills recognition directly.

Two tools to lean on: skip-count up to the neighborhood of the number, and divisibility habits (multiples of 6 must be even and digit-sum divisible by 3). The near-miss numbers in each grid are chosen to punish guessing — that is where the learning happens.

The free MathIt app pairs Multiples Rush with divisibility rules, primes and factor pairs in its grades 3–5 track, with adaptive levels and family battles.

Selecting every multiple in a grid trains something a single-answer drill cannot: systematic checking. A child has to test each number rather than stop at the first one that looks right, and missing one counts as wrong — which is exactly the discipline that later makes factoring and simplifying fractions reliable.

Divisibility shortcuts make it fast. Even numbers for 2, digit-sums divisible by 3 for 3, last two digits for 4, ends in 0 or 5 for 5. Children who learn a couple of these stop testing every number by division and start recognising them.