Difficulty: Easy
Correct Answer: 44
Explanation:
Introduction / Context:
The task is to separate a composite number from a set otherwise consisting of primes.
Given Data / Assumptions:
Concept / Approach:
Check quick divisibility: even > 2 implies composite; then confirm that the others lack small prime divisors.
Step-by-Step Solution:
Verification / Alternative check:
Prime checks up to sqrt(n) for 17, 29, 13 show no non-trivial factors.
Why Other Options Are Wrong:
They are prime and consistent with the majority property.
Common Pitfalls:
Assuming a larger value is more likely composite; size alone is not decisive.
Final Answer:
44 is composite and thus the odd number.
Discussion & Comments