Monday, January 23, 2017

A simple but most devious sequence puzzle


This is a question from a previous, now-defunct version of the Temple of Quetzalcoatl, that I've posted here as an exemplar of one of the difficult puzzles you might encounter while solving it.





The puzzle is simply this:



1845
6745
0738
0956
????



What four-digit number goes into the question marks?


A hint in the source code was presented as such:




-1




Answer



The answer is



1617



Explanation:




264 = 18,446,744,073,709,551,616



This could be written as



1844 6744 0737 0955 1616



Then you just



Add 1 to each of the numbers to get the numbers on the list, so the missing number is 1617




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