5th Grade Factors, Multiples and Primes Worksheet — Level 1 — Practice Set 3 — Answers
Answer sheet with worked solutions for the 5th Grade factors, multiples & primes worksheet.
Success TutoringWorksheetsAnswer sheet5th Grade · Mathematics · Factors, Multiples & Primes5th Grade Factors, Multiples and Primes Worksheet — Level 1 — Practice Set 3 — Answers
Part A: Factors
1.List all the factors of 20.
Answer: 1, 2, 4, 5, 10, 20
2.List all the factors of 34.
Answer: 1, 2, 17, 34
3.List all the factors of 26.
Answer: 1, 2, 13, 26
4.List all the factors of 29.
Answer: 1, 29
Part B: Multiples
5.Write the first five multiples of 3.
Answer: 3, 6, 9, 12, 15
6.Write the first five multiples of 12.
Answer: 12, 24, 36, 48, 60
7.Write the first five multiples of 5.
Answer: 5, 10, 15, 20, 25
8.Write the first five multiples of 7.
Answer: 7, 14, 21, 28, 35
Part C: Prime or not?
9.36 is a prime number.
Answer: False
36 = 2 × 18, so it is composite.
10.28 is a prime number.
Answer: False
28 = 2 × 14, so it is composite.
11.38 is a prime number.
Answer: False
38 = 2 × 19, so it is composite.
12.26 is a prime number.
Answer: False
26 = 2 × 13, so it is composite.
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.