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Give a counterexample to the proposition every positive integer that ends with a 3 is a prime

Give a counterexample to the proposition every positive integer that ends with a 3 is a prime
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Give a counterexample to the proposition every positive integer that ends with a 3 is a prime

User Roy Kachouh
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1 Answer

4 votes
Consider 33; it ends with 3, but
11\mid33, so 33 is not prime.
User Bartgol
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