7th Grade Factors, Multiples and Primes Worksheet — Level 1 — 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 1 — Answers
Part A: Factors
1.List all the factors of 15.
Answer: 1, 3, 5, 15
2.List all the factors of 35.
Answer: 1, 5, 7, 35
3.List all the factors of 26.
Answer: 1, 2, 13, 26
4.List all the factors of 36.
Answer: 1, 2, 3, 4, 6, 9, 12, 18, 36
Part B: Multiples
5.Write the first five multiples of 12.
Answer: 12, 24, 36, 48, 60
6.Write the first five multiples of 8.
Answer: 8, 16, 24, 32, 40
7.Write the first five multiples of 10.
Answer: 10, 20, 30, 40, 50
8.Write the first five multiples of 5.
Answer: 5, 10, 15, 20, 25
Part C: Prime or not?
9.7 is a prime number.
Answer: True
7 has only two factors: 1 and 7.
10.39 is a prime number.
Answer: False
39 = 3 × 13, so it is composite.
11.21 is a prime number.
Answer: False
21 = 3 × 7, so it is composite.
12.20 is a prime number.
Answer: False
20 = 2 × 10, 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.