Year 7 Factors, Multiples and Primes Worksheet — Level 1 — 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 — Answers
Part A: Factors
1.List all the factors of 12.
Answer: 1, 2, 3, 4, 6, 12
2.List all the factors of 21.
Answer: 1, 3, 7, 21
3.List all the factors of 29.
Answer: 1, 29
4.List all the factors of 18.
Answer: 1, 2, 3, 6, 9, 18
Part B: Multiples
5.Write the first five multiples of 10.
Answer: 10, 20, 30, 40, 50
6.Write the first five multiples of 9.
Answer: 9, 18, 27, 36, 45
7.Write the first five multiples of 6.
Answer: 6, 12, 18, 24, 30
8.Write the first five multiples of 5.
Answer: 5, 10, 15, 20, 25
Part C: Prime or not?
9.3 is a prime number.
Answer: True
3 has only two factors: 1 and 3.
10.14 is a prime number.
Answer: False
14 = 2 × 7, so it is composite.
11.33 is a prime number.
Answer: False
33 = 3 × 11, so it is composite.
12.30 is a prime number.
Answer: False
30 = 2 × 15, 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.