Year 7 Factors, Multiples and Primes Worksheet — Level 1 — Practice Set 4 — Answers
Answer sheet with worked solutions for the Year 7 factors, multiples & primes worksheet.
Success TutoringWorksheetsAnswer sheetYear 7 · Mathematics · Factors, Multiples & PrimesYear 7 Factors, Multiples and Primes Worksheet — Level 1 — Practice Set 4 — Answers
Part A: Factors
1.List all the factors of 21.
Answer: 1, 3, 7, 21
2.List all the factors of 12.
Answer: 1, 2, 3, 4, 6, 12
3.List all the factors of 24.
Answer: 1, 2, 3, 4, 6, 8, 12, 24
4.List all the factors of 13.
Answer: 1, 13
Part B: Multiples
5.Write the first five multiples of 10.
Answer: 10, 20, 30, 40, 50
6.Write the first five multiples of 12.
Answer: 12, 24, 36, 48, 60
7.Write the first five multiples of 11.
Answer: 11, 22, 33, 44, 55
8.Write the first five multiples of 4.
Answer: 4, 8, 12, 16, 20
Part C: Prime or not?
9.33 is a prime number.
Answer: False
33 = 3 × 11, so it is composite.
10.21 is a prime number.
Answer: False
21 = 3 × 7, so it is composite.
11.26 is a prime number.
Answer: False
26 = 2 × 13, so it is composite.
12.35 is a prime number.
Answer: False
35 = 5 × 7, 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.