Year 5 Factors, Multiples and Primes Worksheet — Level 3 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 5 factors, multiples & primes worksheet.
Success TutoringWorksheetsAnswer sheetYear 5 · Mathematics · Factors, Multiples & PrimesYear 5 Factors, Multiples and Primes Worksheet — Level 3 — Practice Set 3 — Answers
Part A: Factors
1.List all the factors of 99.
Answer: 1, 3, 9, 11, 33, 99
2.List all the factors of 83.
Answer: 1, 83
3.List all the factors of 97.
Answer: 1, 97
4.List all the factors of 82.
Answer: 1, 2, 41, 82
Part B: Multiples
5.Write the first five multiples of 3.
Answer: 3, 6, 9, 12, 15
6.Write the first five multiples of 5.
Answer: 5, 10, 15, 20, 25
7.Write the first five multiples of 11.
Answer: 11, 22, 33, 44, 55
8.Write the first five multiples of 8.
Answer: 8, 16, 24, 32, 40
Part C: HCF and LCM
9.Find the highest common factor (HCF) of 9 and 17.
Answer: 1
- Factors of 9: 1, 3, 9
- Factors of 17: 1, 17
- Highest common factor = 1
10.Find the lowest common multiple (LCM) of 9 and 33.
Answer: 99
- Multiples of 9: 9, 18, 27, 36…
- Multiples of 33: 33, 66, 99, 132…
- Lowest common multiple = 99
11.Find the lowest common multiple (LCM) of 28 and 8.
Answer: 56
- Multiples of 28: 28, 56, 84, 112…
- Multiples of 8: 8, 16, 24, 32…
- Lowest common multiple = 56
12.Find the highest common factor (HCF) of 13 and 6.
Answer: 1
- Factors of 13: 1, 13
- Factors of 6: 1, 2, 3, 6
- Highest common factor = 1
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