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.

Tags

CCSS.4.OA.B.4

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.

Tags

CCSS.4.OA.B.4

Front

List three examples of composite numbers.

Back

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

Tags

CCSS.4.OA.B.4

Front

List three examples of prime numbers.

Back

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

Tags

CCSS.4.OA.B.4

Front

What is the smallest prime number?

Back

The smallest prime number is 2.

Tags

CCSS.4.OA.B.4

Front

What is the smallest composite number?

Back

The smallest composite number is 4.

Tags

CCSS.4.OA.B.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.

Tags

CCSS.4.OA.B.4

Front

Is the number 1 prime, composite, or neither?

Back

The number 1 is neither prime nor composite.

Tags

CCSS.4.OA.B.4

Front

What is a factor?

Back

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

Tags

CCSS.4.OA.B.4

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.

Tags

CCSS.4.OA.B.4