Multiple choice general knowledge math & puzzles

How many pairs of prime numbers are there to express 18 as the sum of two prime numbers?

  1. 1

  2. 2

  3. 3

  4. 4
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B Correct answer
Explanation

We need to find pairs of prime numbers $(p, q)$ such that $p + q = 18$. The pairs are $(5, 13)$ and $(7, 11)$. Since there are exactly two such pairs, option 20824 is correct.

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