Prime and Composite Numbers

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

What is a composite number?

Back

A composite number is a natural number greater than 1 that has more than two positive divisors.

Front

List the first five prime numbers.

Back

2, 3, 5, 7, 11.

Front

What is the smallest prime number?

Back

The smallest prime number is 2.

Front

Is 1 a prime number? Why or why not?

Back

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

Front

What are the factors of 10?

Back

The factors of 10 are 1, 2, 5, and 10.

Front

Which of the following numbers is prime: 4, 5, 6?

Back

5 is a prime number.

Front

How can you determine if a number is prime?

Back

To determine if a number is prime, check if it has exactly two distinct positive divisors: 1 and itself.

Front

What is the prime factorization of 12?

Back

The prime factorization of 12 is 2 x 2 x 3 (or 2^2 x 3).

Front

Is 15 a prime or composite number?

Back

15 is a composite number.