least common factor

Front

What is the least common multiple (LCM)?

Back

The least common multiple (LCM) of two or more numbers is the smallest multiple that is evenly divisible by all the numbers.

Front

How do you find the LCM of two numbers?

Back

To find the LCM of two numbers, list the multiples of each number and find 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. For example, multiples of 3 are 3, 6, 9, 12, etc.

Front

What is the LCM of 4 and 10?

Back

20

Front

What is the LCM of 15 and 2?

Back

30

Front

What is the LCM of 3 and 4?

Back

12

Front

What are the first five multiples of 7?

Back

7, 14, 21, 28, 35

Front

True or False: The multiples of 7 include 1, 6, 7, 9, 3, 6, 4.

Back

False

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.

Front

Which number is NOT prime: 3, 7, 17, 21?

Back

21