Year 4 Factors, Multiples and Primes Worksheet — Level 3 — Practice Set 2 — Answers
Answer sheet with worked solutions for the Year 4 factors, multiples & primes worksheet.
Success TutoringWorksheetsAnswer sheetYear 4 · Mathematics · Factors, Multiples & PrimesYear 4 Factors, Multiples and Primes Worksheet — Level 3 — Practice Set 2 — Answers
Part A: Factors
1.List all the factors of 34.
Answer: 1, 2, 17, 34
2.List all the factors of 49.
Answer: 1, 7, 49
3.List all the factors of 36.
Answer: 1, 2, 3, 4, 6, 9, 12, 18, 36
4.List all the factors of 75.
Answer: 1, 3, 5, 15, 25, 75
Part B: Multiples
5.Write the first five multiples of 6.
Answer: 6, 12, 18, 24, 30
6.Write the first five multiples of 4.
Answer: 4, 8, 12, 16, 20
7.Write the first five multiples of 7.
Answer: 7, 14, 21, 28, 35
8.Write the first five multiples of 12.
Answer: 12, 24, 36, 48, 60
Part C: HCF and LCM
9.Find the highest common factor (HCF) of 31 and 18.
Answer: 1
- Factors of 31: 1, 31
- Factors of 18: 1, 2, 3, 6, 9, 18
- Highest common factor = 1
10.Find the highest common factor (HCF) of 37 and 38.
Answer: 1
- Factors of 37: 1, 37
- Factors of 38: 1, 2, 19, 38
- Highest common factor = 1
11.Find the lowest common multiple (LCM) of 32 and 20.
Answer: 160
- Multiples of 32: 32, 64, 96, 128…
- Multiples of 20: 20, 40, 60, 80…
- Lowest common multiple = 160
12.Find the lowest common multiple (LCM) of 35 and 11.
Answer: 385
- Multiples of 35: 35, 70, 105, 140…
- Multiples of 11: 11, 22, 33, 44…
- Lowest common multiple = 385
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.