The
Purplemath Forums 
Finding
the Next Value in a Sequence: Sections: Common differences, Recursions, General examples, Nonmath "sequences" There are quite a few sequences handed out to students in math classes that are not even mathematical sequences. Since this bugs me, I'll try to start a collection here of "spoilers", so you can shortcircuit the process of frustration and find your answer here. For instance:
January has
31 days.
"January"
starts with "J".
"Sunday"
starts with "S".
"zero" starts with "Z"
"A" is written
with all straight lines.
This has nothing to do with math, and works by the same reasoning as the preceding example; it just takes the allcurvyline letters, instead of the allstraightline letters..
"1"
is spelled as "one", which has three letters. Another of this sort is 3, 4, 4, 7, 10 (or 11), etc, which represents the numbers of letters (or characters in the squares of 1, 2, 3, 4, 5, etc; namely, 1, 4, 9, 16, 25, etc. (The difference will come from whether or not hyphens are included.)
This one will be more obvious if I spell things out: "8"
is spelled as "eight", which starts with an "e". Golly, they're spelling the digit names and then listing the names alphabetically. So, hmm, "seven" and "six" would come next.
"January"
is spelled with seven letters. << Previous Top  1  2  3  4  5  6  7  Return to Index Next >>



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