Year 8 Factors, Multiples and Primes Worksheet — Level 1 — 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 — Answers
Part A: Factors
1.List all the factors of 16.
Answer: 1, 2, 4, 8, 16
2.List all the factors of 34.
Answer: 1, 2, 17, 34
3.List all the factors of 21.
Answer: 1, 3, 7, 21
4.List all the factors of 25.
Answer: 1, 5, 25
Part B: Multiples
5.Write the first five multiples of 8.
Answer: 8, 16, 24, 32, 40
6.Write the first five multiples of 10.
Answer: 10, 20, 30, 40, 50
7.Write the first five multiples of 3.
Answer: 3, 6, 9, 12, 15
8.Write the first five multiples of 7.
Answer: 7, 14, 21, 28, 35
Part C: Prime or not?
9.19 is a prime number.
Answer: True
19 has only two factors: 1 and 19.
10.13 is a prime number.
Answer: True
13 has only two factors: 1 and 13.
11.28 is a prime number.
Answer: False
28 = 2 × 14, so it is composite.
12.30 is a prime number.
Answer: False
30 = 2 × 15, so it is composite.
Marking tips
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- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
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