Year 7 Factors, Multiples and Primes Worksheet — Level 3 — Practice Set 4 — Answers
Answer sheet with worked solutions for the Year 7 factors, multiples & primes worksheet.
Success TutoringWorksheetsAnswer sheetYear 7 · Mathematics · Factors, Multiples & PrimesYear 7 Factors, Multiples and Primes Worksheet — Level 3 — Practice Set 4 — Answers
Part A: Factors
1.List all the factors of 63.
Answer: 1, 3, 7, 9, 21, 63
2.List all the factors of 44.
Answer: 1, 2, 4, 11, 22, 44
3.List all the factors of 70.
Answer: 1, 2, 5, 7, 10, 14, 35, 70
4.List all the factors of 92.
Answer: 1, 2, 4, 23, 46, 92
Part B: Multiples
5.Write the first five multiples of 5.
Answer: 5, 10, 15, 20, 25
6.Write the first five multiples of 4.
Answer: 4, 8, 12, 16, 20
7.Write the first five multiples of 9.
Answer: 9, 18, 27, 36, 45
8.Write the first five multiples of 11.
Answer: 11, 22, 33, 44, 55
Part C: HCF and LCM
9.Find the highest common factor (HCF) of 14 and 28.
Answer: 14
- Factors of 14: 1, 2, 7, 14
- Factors of 28: 1, 2, 4, 7, 14, 28
- Highest common factor = 14
10.Find the lowest common multiple (LCM) of 22 and 36.
Answer: 396
- Multiples of 22: 22, 44, 66, 88…
- Multiples of 36: 36, 72, 108, 144…
- Lowest common multiple = 396
11.Find the lowest common multiple (LCM) of 15 and 37.
Answer: 555
- Multiples of 15: 15, 30, 45, 60…
- Multiples of 37: 37, 74, 111, 148…
- Lowest common multiple = 555
12.Find the lowest common multiple (LCM) of 33 and 18.
Answer: 198
- Multiples of 33: 33, 66, 99, 132…
- Multiples of 18: 18, 36, 54, 72…
- Lowest common multiple = 198
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