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The following math revision questions are provided in support of the math tutorial on Multiples, Factors, Prime Numbers and Prime Factorization including LCM and GCF. In addition to this tutorial, we also provide revision notes, a video tutorial, revision questions on this page (which allow you to check your understanding of the topic) and calculators which provide full, step by step calculations for each of the formula in the Multiples, Factors, Prime Numbers and Prime Factorization including LCM and GCF tutorials. The Multiples, Factors, Prime Numbers and Prime Factorization including LCM and GCF calculators are particularly useful for ensuring your step-by-step calculations are correct as well as ensuring your final result is accurate.

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Tutorial ID | Title | Tutorial | Video Tutorial | Revision Notes | Revision Questions | |
---|---|---|---|---|---|---|

1.5 | Multiples, Factors, Prime Numbers and Prime Factorization including LCM and GCF |

*1. Which of the following numbers is a multiple of 13? *

- 69
- 1/13
- 52
- 102

**Correct Answer: C**

*2. How many factors does the number 24 have? *

- 8
- 7
- 6
- 5

**Correct Answer: A**

*3. The number 54 written as a product of prime factors is ...............*

- 22 × 32
- 2 × 33
- 2 × 3 × 9
- 6 × 32

**Correct Answer: B**

*4. The number 22 × 3 × 52 corresponds to ...............*

- 300
- 200
- 900
- 120

**Correct Answer: A**

*5. Which of the following numbers is a common multiple of 16 and 20? *

- 36
- 60
- 160
- 300

**Correct Answer: C**

*6. What is the least common multiple of 54 and 81? *

- 27
- 81
- 108
- 162

**Correct Answer: D**

*7. What is the greatest common factor of 32 and 48? *

- 8
- 12
- 16
- 24

**Correct Answer: C**

*8. What is LCM and GCF of 8, 16 and 24? *

- LCM = 8; GCF = 24
- LCM = 24; GCF = 8
- LCM = 48; GCF = 4
- LCM = 24; GCF = 4

**Correct Answer: B**

*9. Which of the following numbers is NOT prime? *

- 41
- 73
- 87
- 103

**Correct Answer: C**

*10. A 30 km × 18 km military base has to be surrounded in its outer border by observation towers that must be equidistant from each other. What is the maximum distance these towers must have from each other? *

- 6 km
- 9 km
- 12 km
- 90 km

**Correct Answer: A**

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- Continuing learning arithmetic - read our next math tutorial: Divisibility Rules

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