5th Grade Factors, Multiples and Primes Worksheet — Level 3 — Practice Set 3 — Answers
Answer sheet with worked solutions for the 5th Grade factors, multiples & primes worksheet.
Success TutoringWorksheetsAnswer sheet5th Grade · Mathematics · Factors, Multiples & Primes5th Grade Factors, Multiples and Primes Worksheet — Level 3 — Practice Set 3 — Answers
Part A: Factors
1.List all the factors of 58.
Answer: 1, 2, 29, 58
2.List all the factors of 14.
Answer: 1, 2, 7, 14
3.List all the factors of 45.
Answer: 1, 3, 5, 9, 15, 45
4.List all the factors of 71.
Answer: 1, 71
Part B: Multiples
5.Write the first five multiples of 3.
Answer: 3, 6, 9, 12, 15
6.Write the first five multiples of 11.
Answer: 11, 22, 33, 44, 55
7.Write the first five multiples of 4.
Answer: 4, 8, 12, 16, 20
8.Write the first five multiples of 5.
Answer: 5, 10, 15, 20, 25
Part C: HCF and LCM
9.Find the lowest common multiple (LCM) of 30 and 20.
Answer: 60
- Multiples of 30: 30, 60, 90, 120…
- Multiples of 20: 20, 40, 60, 80…
- Lowest common multiple = 60
10.Find the highest common factor (HCF) of 12 and 18.
Answer: 6
- Factors of 12: 1, 2, 3, 4, 6, 12
- Factors of 18: 1, 2, 3, 6, 9, 18
- Highest common factor = 6
11.Find the lowest common multiple (LCM) of 25 and 30.
Answer: 150
- Multiples of 25: 25, 50, 75, 100…
- Multiples of 30: 30, 60, 90, 120…
- Lowest common multiple = 150
12.Find the highest common factor (HCF) of 16 and 21.
Answer: 1
- Factors of 16: 1, 2, 4, 8, 16
- Factors of 21: 1, 3, 7, 21
- Highest common factor = 1
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