4th Grade Factors, Multiples and Primes Worksheet — Level 2 — Practice Set 2 — Answers
Answer sheet with worked solutions for the 4th Grade factors, multiples & primes worksheet.
Success TutoringWorksheetsAnswer sheet4th Grade · Mathematics · Factors, Multiples & Primes4th Grade Factors, Multiples and Primes Worksheet — Level 2 — Practice Set 2 — Answers
Part A: Factors
1.List all the factors of 34.
Answer: 1, 2, 17, 34
2.List all the factors of 80.
Answer: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80
3.List all the factors of 84.
Answer: 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84
4.List all the factors of 83.
Answer: 1, 83
Part B: Multiples
5.Write the first five multiples of 10.
Answer: 10, 20, 30, 40, 50
6.Write the first five multiples of 12.
Answer: 12, 24, 36, 48, 60
7.Write the first five multiples of 7.
Answer: 7, 14, 21, 28, 35
8.Write the first five multiples of 3.
Answer: 3, 6, 9, 12, 15
Part C: HCF and LCM
9.Find the highest common factor (HCF) of 9 and 30.
Answer: 3
- Factors of 9: 1, 3, 9
- Factors of 30: 1, 2, 3, 5, 6, 10, 15, 30
- Highest common factor = 3
10.Find the highest common factor (HCF) of 23 and 15.
Answer: 1
- Factors of 23: 1, 23
- Factors of 15: 1, 3, 5, 15
- Highest common factor = 1
11.Find the lowest common multiple (LCM) of 31 and 20.
Answer: 620
- Multiples of 31: 31, 62, 93, 124…
- Multiples of 20: 20, 40, 60, 80…
- Lowest common multiple = 620
12.Find the highest common factor (HCF) of 20 and 13.
Answer: 1
- Factors of 20: 1, 2, 4, 5, 10, 20
- Factors of 13: 1, 13
- Highest common factor = 1
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