Year 4 Factors, Multiples and Primes Worksheet — Level 1 — Answers
Answer sheet with worked solutions for the Year 4 factors, multiples & primes worksheet.
Year 4 · Mathematics · Factors, Multiples & Primes
Year 4 Factors, Multiples and Primes Worksheet — Level 1 — Answers
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Part A — Factors
1.List all the factors of 21.
Answer: 1, 3, 7, 21
2.List all the factors of 28.
Answer: 1, 2, 4, 7, 14, 28
3.List all the factors of 18.
Answer: 1, 2, 3, 6, 9, 18
4.List all the factors of 23.
Answer: 1, 23
Part B — Multiples
5.Write the first five multiples of 10.
Answer: 10, 20, 30, 40, 50
6.Write the first five multiples of 12.
Answer: 12, 24, 36, 48, 60
7.Write the first five multiples of 8.
Answer: 8, 16, 24, 32, 40
8.Write the first five multiples of 7.
Answer: 7, 14, 21, 28, 35
Part C — Prime or not?
9.40 is a prime number.
Answer: False
40 = 2 × 20, so it is composite.
10.44 is a prime number.
Answer: False
44 = 2 × 22, so it is composite.
11.27 is a prime number.
Answer: False
27 = 3 × 9, 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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