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Only one positive Prime number has a 5 in the ones digit. That prime number is 5. All other numbers with a 5 in the ones digit are composite because they will be divisible by 5.

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Q: How many positive prime numbers have a ones digit of 5?

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17, 37, 47, 67, 97

there are 50 prime numbers between 1-100 and of them 2,3,5,7 are single digit so that would leave 46 double digit prime numbers between 1-100

Ten.

149 of them.

13, 23, 43, 53, 73 & 83

Related questions

There are 21 two-digit prime numbers.

There are 17 such numbers.

17, 37, 47, 67, 97

An on-line prime number chart ended at 10007. There are many more charts available for download. So the answer is that there are many five digit prime numbers.

90

there are 50 prime numbers between 1-100 and of them 2,3,5,7 are single digit so that would leave 46 double digit prime numbers between 1-100

24 of them.

Ten.

90

149 of them.

4,000 even numbers, 4,000 odd numbers.

I believe there are 2 positive three-digit perfect cube numbers, that are even.