Year 5 Factors, Multiples and Primes Worksheet — Level 3 — Practice Set 4 — 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 4 — Answers
Part A: Factors
1.List all the factors of 89.
Answer: 1, 89
2.List all the factors of 50.
Answer: 1, 2, 5, 10, 25, 50
3.List all the factors of 59.
Answer: 1, 59
4.List all the factors of 31.
Answer: 1, 31
Part B: Multiples
5.Write the first five multiples of 11.
Answer: 11, 22, 33, 44, 55
6.Write the first five multiples of 6.
Answer: 6, 12, 18, 24, 30
7.Write the first five multiples of 12.
Answer: 12, 24, 36, 48, 60
8.Write the first five multiples of 3.
Answer: 3, 6, 9, 12, 15
Part C: HCF and LCM
9.Find the highest common factor (HCF) of 10 and 40.
Answer: 10
- Factors of 10: 1, 2, 5, 10
- Factors of 40: 1, 2, 4, 5, 8, 10, 20, 40
- Highest common factor = 10
10.Find the lowest common multiple (LCM) of 11 and 34.
Answer: 374
- Multiples of 11: 11, 22, 33, 44…
- Multiples of 34: 34, 68, 102, 136…
- Lowest common multiple = 374
11.Find the lowest common multiple (LCM) of 30 and 28.
Answer: 420
- Multiples of 30: 30, 60, 90, 120…
- Multiples of 28: 28, 56, 84, 112…
- Lowest common multiple = 420
12.Find the highest common factor (HCF) of 21 and 31.
Answer: 1
- Factors of 21: 1, 3, 7, 21
- Factors of 31: 1, 31
- Highest common factor = 1
Marking tips
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