Review 2: Primes and Prime Factors Quiz

Identify the prime number from the following: 15, 17, 21, 27

• 21

• 17

• 15

• 27

Identify the prime number from the following: 28, 30, 31, 33

• 28

• 31

• 33

• 30

Identify the prime number from the following: 37, 38, 39, 41

• 37

• 41

• 39

• 38

The Prime factors of 24 are

(a)   x ​ ​ (b)   x​ (c)   x​ (d)  

• 2
• 3
• 4
• 5

Find the prime factors of 35

• 3,5

• 6,9

• 2,17

• 5,7

Is 47 a prime number? (Yes/No)

• Maybe

• Yes

• No

• Sometimes

Is 50 a prime number? (Yes/No)

• No

• Sometimes

• Yes

• Maybe

Apply prime factorization to find the prime factors of 32

• 2, 2, 3, 3

• 2, 2, 2, 7

• 3, 3, 5

• 5, 11

Apply prime factorisation to find the prime factors of 18:

​ (a)   x ​ (b)   ​ x ​ (c)   ​

• 2
• 3
• 5
• 7
• 1