Finding GCF and LCM of Numbers

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What does GCF stand for?

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GCF stands for Greatest Common Factor.

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What does LCM stand for?

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LCM stands for Least Common Multiple.

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How do you find the GCF of two numbers?

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To find the GCF, list the factors of each number and identify the largest factor that appears in both lists.

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How do you find the LCM of two numbers?

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To find the LCM, list the multiples of each number and identify the smallest multiple that appears in both lists.

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Find the GCF of 50 and 40.

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10

Front

Find the LCM of 3 and 5.

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15

Front

What is the GCF of 12 and 6?

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6

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What is the GCF of 25 and 15?

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5

Front

What is the GCF of 64 and 144?

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16

Front

What is a factor?

Back

A factor is a number that divides another number without leaving a remainder.