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5 votes
All primes larger than 2 have no even digits. Which is a counter example?

a) 2
b) 31
c) 67
d) 87

User Jeremey
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1 Answer

3 votes
We can rule out a, because the question says all primers larger than 2.

Next, we can rule out b because it does not have any even digits.

Now, let's look at 67. 67 is a prime number and it does have an even digit (6). So, c is a counter example.

D is not a counter example because it is not a prime number.
User Stesch
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