Does reversing the order of digits of a 2 digit prime number always result in a prime number

asked May 8, 2016 204k views

3 votes

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5 votes

no
for example:

29 if you switch the digits it becomes 92 and 92 is composite because 2x46=92

Matheus Rocha answered May 11, 2016

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2 votes

No, for example, if you had the prime number 23, and you switched the numbers around, it is 32. 32 is not a prime number.

Doris Liu answered May 15, 2016

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