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 39.
Answer: 1, 3, 13, 39
2.List all the factors of 80.
Answer: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80
3.List all the factors of 49.
Answer: 1, 7, 49
4.List all the factors of 41.
Answer: 1, 41
Part B: Multiples
5.Write the first five multiples of 10.
Answer: 10, 20, 30, 40, 50
6.Write the first five multiples of 8.
Answer: 8, 16, 24, 32, 40
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 highest common factor (HCF) of 20 and 25.
Answer: 5
- Factors of 20: 1, 2, 4, 5, 10, 20
- Factors of 25: 1, 5, 25
- Highest common factor = 5
10.Find the highest common factor (HCF) of 34 and 26.
Answer: 2
- Factors of 34: 1, 2, 17, 34
- Factors of 26: 1, 2, 13, 26
- Highest common factor = 2
11.Find the lowest common multiple (LCM) of 33 and 16.
Answer: 528
- Multiples of 33: 33, 66, 99, 132…
- Multiples of 16: 16, 32, 48, 64…
- Lowest common multiple = 528
12.Find the highest common factor (HCF) of 33 and 23.
Answer: 1
- Factors of 33: 1, 3, 11, 33
- Factors of 23: 1, 23
- Highest common factor = 1
Marking tips
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