Question 238732: List the five (5) 2-digit primes each of whose digits is NOT prime
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! 89
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The digits have to be 4, 6, 8 or 9.
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2, 3, 5 and 7 are prime numbers
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Here are the first few prime numbers:
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97
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Only 89 fits. Who said there are 5?
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