Year 8 Factors, Multiples and Primes Worksheet — Level 1 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 8 factors, multiples & primes worksheet.
Success TutoringWorksheetsAnswer sheetYear 8 · Mathematics · Factors, Multiples & PrimesYear 8 Factors, Multiples and Primes Worksheet — Level 1 — Practice Set 3 — Answers
Part A: Factors
1.List all the factors of 35.
Answer: 1, 5, 7, 35
2.List all the factors of 14.
Answer: 1, 2, 7, 14
3.List all the factors of 32.
Answer: 1, 2, 4, 8, 16, 32
4.List all the factors of 18.
Answer: 1, 2, 3, 6, 9, 18
Part B: Multiples
5.Write the first five multiples of 11.
Answer: 11, 22, 33, 44, 55
6.Write the first five multiples of 7.
Answer: 7, 14, 21, 28, 35
7.Write the first five multiples of 12.
Answer: 12, 24, 36, 48, 60
8.Write the first five multiples of 8.
Answer: 8, 16, 24, 32, 40
Part C: Prime or not?
9.4 is a prime number.
Answer: False
4 = 2 × 2, so it is composite.
10.5 is a prime number.
Answer: True
5 has only two factors: 1 and 5.
11.7 is a prime number.
Answer: True
7 has only two factors: 1 and 7.
12.20 is a prime number.
Answer: False
20 = 2 × 10, 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.