Using the prime factor circles on Polypad can help students make meaning of finding common factors of numbers. Below are two videos showing some ways in which students could find common factors (including the greatest common factor) of 336 and 1260.

# Common Factors

Create a free account!

Mathigon’s free accounts allow you to save your work, set up classes and assign tasks to students. We may also email you occasionally with free resources or lesson plans.