Discussion
If A is the set of prime numbers and B is the set of composite numbers, which statement is true?
Answer: B
Prime numbers have exactly two factors (1 and itself). Composite numbers have more than two factors. By definition, a number cannot be both prime and composite. Therefore, their intersection A ∩ B is the empty set (∅).
Option A is incorrect because the number 1 is neither prime nor composite, so it would not be in the union.
Options C and D are incorrect because 1 is not considered prime or composite.
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