About this worksheet
Factor and multiple work for 4th grade on Common Core 4.OA.4. Two scaffolded boxes walk students through every factor pair of 24 and 36, with the pair equations started (1 × ______ = 24) and a line for the full factor list. A sort splits 7, 12, 19, 21, 29, 35, 41 and 48 into prime and composite columns, four yes-or-no items check whether numbers like 54 and 45 are multiples of 6 and 7, and two mystery-number riddles combine the clues: a multiple of both 4 and 6 between 20 and 30, and an odd prime under 20 whose digits sum to 8. The key resolves both riddles.
