perplexus.info :: Sequences : Tango

Tango (Posted on 2004-11-11)

No complicated set-up for this one! Quite simply, what number comes next and why?
2 4 6 9 11 15 20 ??

See The Solution Submitted by Jenny Turner

Rating: 3.1429 (7 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

I got it (I think.....)

| Comment 6 of 11 |

2,4,6,9,11,15,20,40,51,55,60,90,101,105,110,150

Using Roman numerals, the sequence uses only two symbols ie.

II, IV, VI, iX, XI, XX XL, LI......

Posted by joe on 2004-11-13 10:55:45

Please log in:

Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (3)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:


perplexus dot info