Prime and composite

Front

What is a composite number?

Back

A composite number is a positive integer that has at least one positive divisor other than one or itself, meaning it has more than two factors.

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers, meaning it has exactly two distinct positive divisors: 1 and itself.

Front

List three examples of composite numbers.

Back

4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25.

Front

List three examples of prime numbers.

Back

2, 3, 5, 7, 11, 13, 17, 19, 23, 29.

Front

What is the smallest prime number?

Back

The smallest prime number is 2.

Front

What is the smallest composite number?

Back

The smallest composite number is 4.

Front

What is the relationship between even numbers and composite numbers?

Back

All even numbers greater than 2 are composite because they have at least three factors: 1, 2, and the number itself.

Front

Is the number 1 prime, composite, or neither?

Back

The number 1 is neither prime nor composite.

Front

What is a factor?

Back

A factor is a whole number that can be divided evenly into another number.

Front

How can you determine if a number is prime?

Back

To determine if a number is prime, check if it has only two factors: 1 and itself. If it has more than two factors, it is composite.