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 Interactive Checkpoint
 Greatest Common Factor (GCF):  The largest factor that two or more numbers have in common.

Answer the following questions about greatest common factors.

Input your answer and press tab to grade your response

Graded Response
a) What is the greatest common factor between 18 and 60? a)
b) The greatest common factor between 40 and an unknown number is 10. What is a possible answer for the unknown number? b)