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Tango (Posted on 2004-11-11) Difficulty: 2 of 5
No complicated set-up for this one! Quite simply, what number comes next and why?
2 4 6 9 11 15 20 ??

  Submitted by Jenny Turner    
Rating: 3.1429 (7 votes)
Solution: (Hide)
It takes two to tango!
The sequence in roman numerals runs:
II IV VI IX XI XV XX
Each number is written with exactly two letters. Then next one is XL, or 40.

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Hints/Tipsre: I got it (I think.....) ....Ady TZIDON2013-06-10 09:21:52
SolutionNice ProblemK Sengupta2007-03-09 04:40:37
SolutionThanks Nikki ....joe2004-11-18 13:59:16
Titlenikki2004-11-17 10:07:28
SolutionI got it (I think.....)joe2004-11-13 10:55:45
Some ThoughtsI got it!Dustin2004-11-12 09:39:03
re: Hints and spoilersnp_rt2004-11-11 11:07:01
re: an answer - but inelegantLauren2004-11-11 10:40:42
Hints/TipsHints and spoilersB2004-11-11 10:15:21
an answer - but inelegantPete2004-11-11 08:47:47
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