Sample Quiz

Which of the following is a factor pair of 72? 

• 12 and 7 

• 36 and 36 

• 9 and 8

• 6 and 6

1, 2, 3, 4, 6 and 12 are all ______ of 12. 

• Factors

• Mutiples

• Friends

• Multiplication

All the factor pairs for the number 40 are listed below. 

1 and 40 

2 and 20 

4 and 10 

5 and 8 

• false

• Not true

• True

• No idea

How many factor pairs are there for the number 28? 

• 1

• 2

• 5

• 3

Which of the following numbers is prime? 

• 2

• 21

• 17

• 9

Find the HCF of 15 and 6. 

• 5

• 6

• 2

• 3

Four students each wrote down a number between 30 and 40. The list shows the numbers they wrote. 

Elly- 35, Jody- 39, Maggie- 37, Palmer-33 

Who wrote an even number?

• Elly

• Jody

• Maggie

• Vera

Brenda said that the number 2 is prime because it has only two factors. Carla said that the number 2 is only an even number and Jane said that 2 is both a prime and an even number. Who is correct? 

• Brenda

• Carla

• Jane

• Ben

Which of the following are prime numbers? 

• 3

• 6

• 9

• 4

2 × 5 × 7 is the prime factorization of a certain number. Find the number. 

• 15

• 20

• 45

• 70