7th Grade Factors, Multiples and Primes Worksheet — Level 3 — Practice Set 2 — Answers
Answer sheet with worked solutions for the 7th Grade factors, multiples & primes worksheet.
Success TutoringWorksheetsAnswer sheet7th Grade · Mathematics · Factors, Multiples & Primes7th Grade Factors, Multiples and Primes Worksheet — Level 3 — Practice Set 2 — Answers
Part A: Factors
1.List all the factors of 74.
Answer: 1, 2, 37, 74
2.List all the factors of 81.
Answer: 1, 3, 9, 27, 81
3.List all the factors of 47.
Answer: 1, 47
4.List all the factors of 53.
Answer: 1, 53
Part B: Multiples
5.Write the first five multiples of 4.
Answer: 4, 8, 12, 16, 20
6.Write the first five multiples of 3.
Answer: 3, 6, 9, 12, 15
7.Write the first five multiples of 6.
Answer: 6, 12, 18, 24, 30
8.Write the first five multiples of 11.
Answer: 11, 22, 33, 44, 55
Part C: HCF and LCM
9.Find the lowest common multiple (LCM) of 33 and 20.
Answer: 660
- Multiples of 33: 33, 66, 99, 132…
- Multiples of 20: 20, 40, 60, 80…
- Lowest common multiple = 660
10.Find the lowest common multiple (LCM) of 18 and 21.
Answer: 126
- Multiples of 18: 18, 36, 54, 72…
- Multiples of 21: 21, 42, 63, 84…
- Lowest common multiple = 126
11.Find the lowest common multiple (LCM) of 24 and 23.
Answer: 552
- Multiples of 24: 24, 48, 72, 96…
- Multiples of 23: 23, 46, 69, 92…
- Lowest common multiple = 552
12.Find the lowest common multiple (LCM) of 19 and 40.
Answer: 760
- Multiples of 19: 19, 38, 57, 76…
- Multiples of 40: 40, 80, 120, 160…
- Lowest common multiple = 760
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