Pre Prime Number

A ____ number is a positive integer that is divisible by exactly two positive integers: 1 and the number itself.

A ____ number is a positive integer that is divisible by more than two positive integers.

a number is _____ if it is divisible by some positive integer besides 1 and the number itself.

2 is a prime number

• True

• False

Every even number is a composite number

• True

• False

Every odd number is a prime number

• True

• False

Which of the following numbers are prime numbers?

• 2

• 5

• 7

• 9

Which of the following numbers is a prime numbers?

• 61

• 91

• 143

• 169

Which of the following numbers are composite numbers?

• 61

• 91

• 121

• 169

Find the largest two-digit composite number in which both digits are prime.