Im doing practice questions for an interview and the Sequence is 55,47,52,13,39,31,36 The guide tells me the answer is 9 but I have no idea how they are getting that answer??

Question

anonymous · Answer

what is the question? you just gave the sequence, but not what to do with the sequence.

anonymous · Answer

All they say is what is the next number in the sequence? they gave me like 20 practice questions this is the only one that I can't figure out how they get the next number in the sequence

anonymous · Answer

yeah....no idea on that.  especially for that answer....i dont see it.  You should mess with them by coming up with your own sequence , and creating a formula for that. ive done that once, it was funny (to me anyways >.>)

anonymous · Answer

yeah thanks lol i may just have to

anonymous · Answer

I was a little bored, here is a ridiculous formula that works for the above numbers (for n = 1,...7) 
To see that this works click this link and scroll down to the part that says "Values".