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What's My Number?

Puzzle 6

Difficulty:
Fun:
(based on 19 votes)

I am thinking of a whole number between 1 and 20, inclusive.
  • My number is either 1 less than a prime number or 3 greater than a prime number.
  • My number is either twice a prime number or 4 less than twice a prime number.
  • My number is neither prime nor the product of two distinct prime numbers.
  • My number is the smaller of the two numbers that fit all of the above requirements.

What is my number?

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