Year 4 Factors, Multiples and Primes Worksheet — Level 3 — 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 — Answers
Part A: Factors
1.List all the factors of 75.
Answer: 1, 3, 5, 15, 25, 75
2.List all the factors of 76.
Answer: 1, 2, 4, 19, 38, 76
3.List all the factors of 43.
Answer: 1, 43
4.List all the factors of 30.
Answer: 1, 2, 3, 5, 6, 10, 15, 30
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 7.
Answer: 7, 14, 21, 28, 35
8.Write the first five multiples of 6.
Answer: 6, 12, 18, 24, 30
Part C: HCF and LCM
9.Find the highest common factor (HCF) of 27 and 14.
Answer: 1
- Factors of 27: 1, 3, 9, 27
- Factors of 14: 1, 2, 7, 14
- Highest common factor = 1
10.Find the highest common factor (HCF) of 6 and 40.
Answer: 2
- Factors of 6: 1, 2, 3, 6
- Factors of 40: 1, 2, 4, 5, 8, 10, 20, 40
- Highest common factor = 2
11.Find the lowest common multiple (LCM) of 31 and 31.
Answer: 31
- Multiples of 31: 31, 62, 93, 124…
- Multiples of 31: 31, 62, 93, 124…
- Lowest common multiple = 31
12.Find the highest common factor (HCF) of 28 and 7.
Answer: 7
- Factors of 28: 1, 2, 4, 7, 14, 28
- Factors of 7: 1, 7
- Highest common factor = 7
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.