There is not a greatest common factor of 150 because there cannot be a greatest common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common.
The factors of 150 are 1, 2, 3, 5, 6, 10, 15, 25, 30, 50, 75, and 150.
The prime factors of 150 are 2, 3, 5, and 5.
You need at least two numbers to find a GCF.
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30 is a factor of 150 so 30 is the greatest common factor of 30 and 150
The greatest common factor of 100 and 150 is 50.
The greatest common factor of 75, 150, and 225 is 75
The greatest common factor of 45 and 150 is 15.
The greatest common factor of 150 225 450 and 600 is 75.