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How many two-digit prime numbers

A book called The Penguin Dictionary of Curious and Interesting Numbers by David Wells (1986) contains fascinating numbers and
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2. asked by Kris
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The units digit of a three-digit number is prime. The hundreds digit is twice the tens digit. How many of these three digit
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2. asked by Larry
3. 636 views
How many two-digit prime numbers can be formed by choosing two different digits from the set {2, 7, 8, 9} to be used as the tens
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2. 96 views
How many two-digit prime numbers can be formed by choosing two different digits from the set 2, 7, 8, 9 to be used as the tens
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2. 97 views
Solve the mathematical puzzle.Determine the digits of Z from these clues. The fourth digit of Z is the largest prime factor of
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2. asked by beyonce
3. 1,706 views
Find all the two digit prime numbers neither of whose digits are prime.Someone helped me yesterday but I do not understand.
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2. asked by Diana
3. 1,307 views
there are two prime numbers between 100 and 199 such that the ten digits is a prime number, the ones digit is a prime number and
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2. asked by alya
3. 2,106 views
The digits 1,2,3,4,5,6,7,8,9 are used to form four two-digit prime numbers, with each digit used exactly once. What is the sum
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2. asked by ooooookkkkkk
3. 851 views
What is the largest two digit prime number whose digits are bothprime numbers?
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2. asked by Ashley
3. 977 views
The Florida Lottery is made up of the numbers 1-49. My mother has observed that the winning numbers many times are prime
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2. asked by Anonymous
3. 1,033 views