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 100.
Answer: 1, 2, 4, 5, 10, 20, 25, 50, 100
2.List all the factors of 88.
Answer: 1, 2, 4, 8, 11, 22, 44, 88
3.List all the factors of 94.
Answer: 1, 2, 47, 94
4.List all the factors of 52.
Answer: 1, 2, 4, 13, 26, 52
Part B: Multiples
5.Write the first five multiples of 8.
Answer: 8, 16, 24, 32, 40
6.Write the first five multiples of 4.
Answer: 4, 8, 12, 16, 20
7.Write the first five multiples of 12.
Answer: 12, 24, 36, 48, 60
8.Write the first five multiples of 10.
Answer: 10, 20, 30, 40, 50
Part C: HCF and LCM
9.Find the highest common factor (HCF) of 20 and 33.
Answer: 1
- Factors of 20: 1, 2, 4, 5, 10, 20
- Factors of 33: 1, 3, 11, 33
- Highest common factor = 1
10.Find the lowest common multiple (LCM) of 37 and 19.
Answer: 703
- Multiples of 37: 37, 74, 111, 148…
- Multiples of 19: 19, 38, 57, 76…
- Lowest common multiple = 703
11.Find the highest common factor (HCF) of 38 and 36.
Answer: 2
- Factors of 38: 1, 2, 19, 38
- Factors of 36: 1, 2, 3, 4, 6, 9, 12, 18, 36
- Highest common factor = 2
12.Find the highest common factor (HCF) of 22 and 9.
Answer: 1
- Factors of 22: 1, 2, 11, 22
- Factors of 9: 1, 3, 9
- Highest common factor = 1
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