Year 7 Factors, Multiples and Primes Worksheet — Level 3 — Practice Set 3 — 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 3 — Answers
Part A: Factors
1.List all the factors of 64.
Answer: 1, 2, 4, 8, 16, 32, 64
2.List all the factors of 89.
Answer: 1, 89
3.List all the factors of 65.
Answer: 1, 5, 13, 65
4.List all the factors of 30.
Answer: 1, 2, 3, 5, 6, 10, 15, 30
Part B: Multiples
5.Write the first five multiples of 10.
Answer: 10, 20, 30, 40, 50
6.Write the first five multiples of 11.
Answer: 11, 22, 33, 44, 55
7.Write the first five multiples of 8.
Answer: 8, 16, 24, 32, 40
8.Write the first five multiples of 12.
Answer: 12, 24, 36, 48, 60
Part C: HCF and LCM
9.Find the lowest common multiple (LCM) of 35 and 6.
Answer: 210
- Multiples of 35: 35, 70, 105, 140…
- Multiples of 6: 6, 12, 18, 24…
- Lowest common multiple = 210
10.Find the highest common factor (HCF) of 10 and 22.
Answer: 2
- Factors of 10: 1, 2, 5, 10
- Factors of 22: 1, 2, 11, 22
- Highest common factor = 2
11.Find the lowest common multiple (LCM) of 27 and 11.
Answer: 297
- Multiples of 27: 27, 54, 81, 108…
- Multiples of 11: 11, 22, 33, 44…
- Lowest common multiple = 297
12.Find the highest common factor (HCF) of 25 and 18.
Answer: 1
- Factors of 25: 1, 5, 25
- Factors of 18: 1, 2, 3, 6, 9, 18
- Highest common factor = 1
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