GCF and LCM

Front

What does GCF stand for in mathematics?

Back

GCF stands for Greatest Common Factor.

Front

What does LCM stand for in mathematics?

Back

LCM stands for Least Common Multiple.

Front

How do you find the GCF of two numbers?

Back

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

Front

How do you find the LCM of two numbers?

Back

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

Front

What is a multiple?

Back

A multiple of a number is the product of that number and an integer.

Front

What is a factor?

Back

A factor of a number is an integer that can be multiplied by another integer to produce that number.

Front

Is 18 a factor of 9?

Back

No, 18 is not a factor of 9.

Front

What is the GCF of 18 and 24?

Back

The GCF of 18 and 24 is 6.

Front

What is the GCF of 64 and 144?

Back

The GCF of 64 and 144 is 16.

Front

If two signs blink every 9 seconds and 15 seconds, how do you find when they blink together?

Back

To find when they blink together, calculate the LCM of 9 and 15.