Prime, Composite, Factors and Multiples

Front

What is a prime number?

Back

A prime number is a whole number greater than 1 that has no positive divisors other than 1 and itself. Examples: 2, 3, 5, 7.

Front

What is a composite number?

Back

A composite number is a whole number greater than 1 that has more than two positive divisors. Examples: 4, 6, 8, 9.

Front

What are factors?

Back

Factors are numbers that can be multiplied together to get another number. For example, the factors of 15 are 1, 3, 5, and 15.

Front

What are multiples?

Back

Multiples are the result of multiplying a number by an integer. For example, the multiples of 3 are 3, 6, 9, 12, 15, etc.

Front

What is the least common multiple (LCM)?

Back

The least common multiple is the smallest multiple that two or more numbers share. For example, the LCM of 4 and 5 is 20.

Front

What is the greatest common factor (GCF)?

Back

The greatest common factor is the largest factor that two or more numbers share. For example, the GCF of 8 and 12 is 4.

Front

Is 1 a prime number?

Back

No, 1 is not a prime number because it only has one positive divisor.

Front

What is the prime factorization of 12?

Back

The prime factorization of 12 is 2 x 2 x 3 or 2² x 3.

Front

Which of the following is a multiple of 7? 14, 20, 25, 30

Back

14 is a multiple of 7.

Front

Which of the following is not a multiple of 6? 12, 18, 24, 25

Back

25 is not a multiple of 6.