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What is the largest double digit prime number that when written in reverse is also a prime number?
Wiki User
∙ 14y ago
Answer: 97
Well 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 97
The 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.
Wiki User
∙ 14y ago
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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?
It is 97. it is largest, because it is the largest double digit prime number.
What is the largest prime number that backwards is also a prime number?
There is no largest one, as there will always potentially be other pair such that one is the reverse of the other.
What is the largest double digit prime number?
97
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de
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Read 2 numbers. If first is larger than second, display second, else display first. That's for the smallest. For the largest reverse the two. For each of the other two, it's easier to just create a variable, call it largest. Initialize it to a very small number, say -1. As you read each number, compare it to largest. If the number is larger than largest, set largest equal to the number. When you finish each list of numbers, then print largest. Best answer Read 2 numbers. If first is larger than second, display second, else display first. That's for the smallest. For the largest reverse the two. For each of the other two, it's easier to just create a variable, call it largest. Initialize it to a very small number, say -1. As you read each number, compare it to largest. If the number is larger than largest, set largest equal to the number. When you finish each list of numbers, then print largest.
