Year 5 Factors, Multiples and Primes Worksheet — Level 1 — 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 1 — Practice Set 4 — Answers
Part A: Factors
1.List all the factors of 33.
Answer: 1, 3, 11, 33
2.List all the factors of 25.
Answer: 1, 5, 25
3.List all the factors of 23.
Answer: 1, 23
4.List all the factors of 19.
Answer: 1, 19
Part B: Multiples
5.Write the first five multiples of 7.
Answer: 7, 14, 21, 28, 35
6.Write the first five multiples of 11.
Answer: 11, 22, 33, 44, 55
7.Write the first five multiples of 12.
Answer: 12, 24, 36, 48, 60
8.Write the first five multiples of 4.
Answer: 4, 8, 12, 16, 20
Part C: Prime or not?
9.5 is a prime number.
Answer: True
5 has only two factors: 1 and 5.
10.18 is a prime number.
Answer: False
18 = 2 × 9, so it is composite.
11.20 is a prime number.
Answer: False
20 = 2 × 10, so it is composite.
12.37 is a prime number.
Answer: True
37 has only two factors: 1 and 37.
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.