Year 5 Factors, Multiples and Primes Worksheet — Level 1 — 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 1 — Practice Set 3 — Answers
Part A: Factors
1.List all the factors of 21.
Answer: 1, 3, 7, 21
2.List all the factors of 24.
Answer: 1, 2, 3, 4, 6, 8, 12, 24
3.List all the factors of 34.
Answer: 1, 2, 17, 34
4.List all the factors of 13.
Answer: 1, 13
Part B: Multiples
5.Write the first five multiples of 11.
Answer: 11, 22, 33, 44, 55
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 9.
Answer: 9, 18, 27, 36, 45
Part C: Prime or not?
9.2 is a prime number.
Answer: True
2 has only two factors: 1 and 2.
10.27 is a prime number.
Answer: False
27 = 3 × 9, so it is composite.
11.5 is a prime number.
Answer: True
5 has only two factors: 1 and 5.
12.18 is a prime number.
Answer: False
18 = 2 × 9, so it is composite.
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.