## Sequence

What comes next?

5, 3, 42, 86, 15, 24, 25, 168, 2, 4, ?

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 6 could it be
 Nope, not 6. Larger.

## Sequence

- - - - - - - -

 Good job, Bicycle Tree! You're good.
 Recognitions: Gold Member Homework Help Science Advisor Is anybody going to explain?
 Ok. The sequence is a palindrome.
 Blog Entries: 1 Recognitions: Gold Member In that case, 3 would serve as well (until moo added the extra condition).
 what palindrome suppose to mean ?

Man... darn... I saw it right after I looked at BicycleTree's response... Oh well.

 Quote by ArielGenesis what palindrome suppose to mean ?
Palindrome is the same backwards as it is forwards... they just have the commas in strange places.

 Recognitions: Homework Help Science Advisor But there's an infinite number of options that makes it a palindrome. For example: 42861524251682435 142861524251682435 1142861524251682435 11142861524251682435 111142861524251682435 1111142861524251682435 And so on.
 If you take the 4 (from the 24) as the middle of the sequence, then the numbers before and after are the same. So directly before/after the 4 there is a 2 then a 5 then a 1 then a 6 and then an 8 and so on. I would have thought that the answer could have also been: '3, 5' (but then there would be more commas on the right of the 4) PS
 so the trick is just right at the comma. i got it. thx all