Year 7 Factors, Multiples and Primes Worksheet — Level 1 — Practice Set 3 — 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 3 — Answers
Part A: Factors
1.List all the factors of 14.
Answer: 1, 2, 7, 14
2.List all the factors of 25.
Answer: 1, 5, 25
3.List all the factors of 17.
Answer: 1, 17
4.List all the factors of 20.
Answer: 1, 2, 4, 5, 10, 20
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 5.
Answer: 5, 10, 15, 20, 25
8.Write the first five multiples of 12.
Answer: 12, 24, 36, 48, 60
Part C: Prime or not?
9.12 is a prime number.
Answer: False
12 = 2 × 6, so it is composite.
10.22 is a prime number.
Answer: False
22 = 2 × 11, so it is composite.
11.31 is a prime number.
Answer: True
31 has only two factors: 1 and 31.
12.47 is a prime number.
Answer: True
47 has only two factors: 1 and 47.
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.