Year 4 Factors, Multiples and Primes Worksheet — Level 2 — Answers
Answer sheet with worked solutions for the Year 4 factors, multiples & primes worksheet.
Success TutoringWorksheetsAnswer sheetYear 4 · Mathematics · Factors, Multiples & PrimesYear 4 Factors, Multiples and Primes Worksheet — Level 2 — Answers
Part A: Factors
1.List all the factors of 23.
Answer: 1, 23
2.List all the factors of 42.
Answer: 1, 2, 3, 6, 7, 14, 21, 42
3.List all the factors of 89.
Answer: 1, 89
4.List all the factors of 19.
Answer: 1, 19
Part B: Multiples
5.Write the first five multiples of 4.
Answer: 4, 8, 12, 16, 20
6.Write the first five multiples of 11.
Answer: 11, 22, 33, 44, 55
7.Write the first five multiples of 7.
Answer: 7, 14, 21, 28, 35
8.Write the first five multiples of 10.
Answer: 10, 20, 30, 40, 50
Part C: HCF and LCM
9.Find the lowest common multiple (LCM) of 28 and 11.
Answer: 308
- Multiples of 28: 28, 56, 84, 112…
- Multiples of 11: 11, 22, 33, 44…
- Lowest common multiple = 308
10.Find the highest common factor (HCF) of 22 and 36.
Answer: 2
- Factors of 22: 1, 2, 11, 22
- Factors of 36: 1, 2, 3, 4, 6, 9, 12, 18, 36
- Highest common factor = 2
11.Find the lowest common multiple (LCM) of 6 and 33.
Answer: 66
- Multiples of 6: 6, 12, 18, 24…
- Multiples of 33: 33, 66, 99, 132…
- Lowest common multiple = 66
12.Find the highest common factor (HCF) of 25 and 32.
Answer: 1
- Factors of 25: 1, 5, 25
- Factors of 32: 1, 2, 4, 8, 16, 32
- Highest common factor = 1
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