ABCya! Number Ninja - Multiples

Number Ninja – Multiples is a fast-action way to practice math facts.

youcubed: Counting Cogs
youcubed (Stanford University)

This problem requires children to think about factors and multiples and, in particular, common factors, but it is not necessary for them to have met this term prior to having a go at the task.

NRICH: Factors and Multiples Game
NRICH (University of Cambridge)

Here is an interactive version of the game in which you drag the numbers from the left hand grid and drop them on the right hand grid