Prime Numbers Card Game

Aces = 1.

Jacks = 11.

Queens = 12.

Kings = 13.

Do you understand?

• yes

• no

Prime, composite, or neither?

• prime

• composite

• neither

Answer explanation

8 is a composite number:

- it is an even number and all even numbers (except 2) are composite

- it has more than 2 factors: 1, 2, 4, 8)

Prime, composite, or neither?

• prime

• composite

• neither

Answer explanation

5 is a prime number because it has only 2 factors: 1 and 5.

Prime, composite, or neither?

• prime

• composite

• neither

Answer explanation

2 is the only even prime number.

2 is a prime number because it only has 2 factors: 1 and 2.

Prime, composite, or neither?

• prime

• composite

• neither

Answer explanation

9 is a composite number. Its factors are: 1, 3, 9.

Prime, composite, or neither?

• prime

• composite

• neither

Answer explanation

10 is a composite number. Its factors are: 1, 2, 5, 10.

Prime, composite, or neither?

(Remember Jacks = 11)

• prime

• composite

• neither

Answer explanation

Since the Jack is worth 11 points, the correct answer is prime.

The only factors of 11 are 1 and 11.

Prime, composite, or neither?

• prime

• composite

• neither

Answer explanation

4 is a composite number.

It is even, and all even numbers (except 2) are composite.

The factors of 4 are 1, 2, 4.

Prime, composite, or neither?

• prime

• composite

• neither

Answer explanation

7 is a prime number.

The only 2 factors of 7 are 1 and 7.

Prime, composite, or neither?

(Remember, Kings = 13)

• prime

• composite

• neither

Answer explanation

The King is worth 13 points.

13 is a prime number. Its only 2 factors are 1 and 13.