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# How do you figure out what the largest double digit prime number that when written in reverse is also a prime number?

Updated: 12/10/2022

Wiki User

14y ago

It is 97. it is largest, because it is the largest double digit Prime number.

Wiki User

14y ago

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Q: How do you figure out what the largest double digit prime number that when written in reverse is also a prime number?
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### What is the largest double digit prime number that when written in reverse is also a prime number?

Answer: 97Well the easiest way to figure that out is to start with the largest double digit prime and work backwards. There are not that many.Here are all the double digit primes:11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97The answer is 97 since 79 is also prime. See we did not have to look too far if we start with the largest double digit prime!97 does not work because 79 is composite.

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