# Unit Quiz: Factors Multiple and Primes

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## Q1. True or False, three of these numbers are prime and more than 20.

### Options:

- True
- False

### Correct Answer:

- False

## Q2. Which number lies in the intersection (middle) of this Venn diagram?

### Options:

- 10
- 6
- 2
- 2 and 2

### Correct Answer:

- 2

## Q3. How many of the factors of 39 are prime numbers?

### Options:

- 1
- 2
- 3
- 4

### Correct Answer:

- 2

## Q4. Which two prime numbers sum to 40?

### Options:

- 2 and 38
- 7 and 33
- 17 and 23
- 29 and 21

### Correct Answer:

- 17 and 23

## Q5. The product of which two prime numbers find another prime number?

### Options:

- 2 and 3
- 2 and 7
- 13 and 11
- None of these

### Correct Answer:

- None of these

## Q6.

### Options:

- True
- False

### Correct Answer:

- True

## Q7.

### Options:

- A
- B
- C
- D

### Correct Answer:

- C

## Q8.

### Options:

- A
- B
- C

### Correct Answer:

- C

## Q9. True or False

### Options:

- True
- False

### Correct Answer:

- True

## Q10. Q1) Write 4 x 14 as a product of prime factors.

### Options:

- A
- B
- C
- D

### Correct Answer:

- C

## Q11. Which number is missing from this diagram?

### Options:

- 2
- 3
- 4
- 9

### Correct Answer:

- 3

## Q12. Write 300 as the product of prime factors in index form.

### Options:

- A
- B
- C
- D

### Correct Answer:

- D

## Q13. Find the missing number/s.

### Options:

- 2
- 3
- 4
- 2 and 3

### Correct Answer:

- 3

## Q14. What is the 6th multiple of 15?

### Options:

- 45
- 90
- 6
- 15

### Correct Answer:

- 90

## Q15. Which are the factors of 28?

### Options:

- 4 and 7
- 1, 4 and 7
- 1, 2, 4, 7, 14 and 28
- 14 and 2

### Correct Answer:

- 1, 2, 4, 7, 14 and 28

## Q16. Which numbers are missing from the Venn diagram?

### Options:

- 2 and 0
- 80 and 160
- 2 and 8
- 1, 2 , 4 and 8

### Correct Answer:

- 2 and 8

## Q17. A number less than 20 is missing from the Venn diagram. What is the missing number?

### Options:

- 15
- 20
- 18
- 16

### Correct Answer:

- 15