Practice Greatest Common Factor in Math

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

Quick Recap

The largest positive integer that divides evenly into two or more given numbers with no remainder.

The biggest 'piece' size that fits evenly into two numbers—like the largest tile that covers both a 12-unit and 18-unit floor.

Example 1

easy
Find the GCF of 48 and 36.

Example 2

medium
Find the GCF of 84, 126, and 210.

Example 3

easy
Find the GCF of 60 and 45.

Example 4

easy
A teacher has ribbons of lengths 24 cm and 36 cm. She wants to cut them into the longest equal pieces with no leftover. How long should each piece be?
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