-- Posted by MagicHunter at 11:01 pm on April 5, 2008 I have this brain-teaser book and one of the challenges was one of those "complete this sequence of numbers". The pattern is supposed to be based off prime number reversals? I'm not very savvy with math, anyone know what those are? Thanks -- Posted by Ryan Potter at 11:07 pm on April 5, 2008 All I can think of is just reversing the digits of a prime number, like 113 becomes 311, or 19 becomes 91. -- Posted by Just Waiting Here at 11:08 pm on April 5, 2008 I've never heard this term... but knowing the actual question from the sequence might help in being able to determine what they are. It could be prime numbers taken in reverse...?  (ie, 13/31, 17/71) Or otherwise it could just be prime numbers taken in a reverse order.  (17, 13, 11, 7, 5, 3, 2)... but I'm not really familiar with the term myself.  So I'm quite interested in the solution to the problem if anyone else might know. If not, the answer to the question might be able to explain what they are.