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Puzzle ZOYR 



??

What number comes next in this sequence:

1  4  8  13  21  30  36  {?}

Puzzle Copyright © Kevin Stone

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Answer
45.

Reasoning
Each term increases by the number of letters in the previous term (ignoring any hyphens).
1  + length("ONE")       = 4
4  + length("FOUR")      = 8
8  + length("EIGHT")     = 13
13 + length("THIRTEEN")  = 21
21 + length("TWENTYONE") = 30
30 + length("THIRTY")    = 36
36 + length("THIRTYSIX") = 45

 

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