Priya picks a number n. She finds that n is composite, n is odd, and n is less than 20.
Which of these could be Priya's number?

Question

Priya picks a number n. She finds that n is composite, n is odd, and n is less than 20. Which of these could be Priya's number?

Accepted Answer

9. Priya's number must be composite, odd and less than 20. 9 = 3x3 is composite, odd and less than 20, so it fits. 11, 17 and 19 are all prime.

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