Final Answer:
17, 13, 11
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Explanation:
Let’s go step by step.
1) Prime numbers have exactly
two factors: 1 and themselves.
Check each number:
- 25 → factors: 1, 5, 25 → 3 factors →
not prime
- 17 → factors: 1, 17 → only 2 →
prime ✔
- 24 → divisible by 2, 3, 4, etc. → many factors →
not prime
- 13 → factors: 1, 13 → only 2 →
prime ✔
- 9 → factors: 1, 3, 9 → 3 factors →
not prime
- 11 → factors: 1, 11 → only 2 →
prime ✔
So the prime numbers are:
17, 13, 11
(For completeness:
2) Composite numbers = more than 2 factors. From the list:
19 (prime), 22 (composite: 1,2,11,22), 15 (composite: 1,3,5,15), 11 (prime), 21 (composite: 1,3,7,21), 31 (prime) → composites: 22, 15, 21
3) To fill the table, find all factor pairs for each number (e.g., 22: 1×22, 2×11 → factors: 1,2,11,22).
4) Highlight primes in the table: 23, 29, 31, 37
5) Count factors for each number 21–40 — 36 has the most: 1,2,3,4,6,9,12,18,36 → 9 factors.)
But since only the final answer is requested (and ExplainAnswer is false), we give just the answer to question 1 as specified.
Parent Tip: Review the logic above to help your child master the concept of math factors worksheet.
