Year 8 Factors, Multiples and Primes Worksheet — Level 1 — Practice Set 4 — 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 4 — Answers
Part A: Factors
1.List all the factors of 28.
Answer: 1, 2, 4, 7, 14, 28
2.List all the factors of 30.
Answer: 1, 2, 3, 5, 6, 10, 15, 30
3.List all the factors of 19.
Answer: 1, 19
4.List all the factors of 22.
Answer: 1, 2, 11, 22
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 10.
Answer: 10, 20, 30, 40, 50
8.Write the first five multiples of 3.
Answer: 3, 6, 9, 12, 15
Part C: Prime or not?
9.17 is a prime number.
Answer: True
17 has only two factors: 1 and 17.
10.38 is a prime number.
Answer: False
38 = 2 × 19, so it is composite.
11.2 is a prime number.
Answer: True
2 has only two factors: 1 and 2.
12.32 is a prime number.
Answer: False
32 = 2 × 16, 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.