Saturday, January 24, 2009

Number sequences

Back from the break, with new interesting sequence I learned:

1 2 4 6 3 9 12 8 10 5…
what are the next number(s)?

This can be rather hard sequence to solve, it seems random but its actually not.
Note: Comments may have spoilers! Come up with solution on your own before reading them.


Anonymous said...

Argh.. I couldn't figure it out. What is it?

Anonymous said...

The next 2 numbers are 6 and 0?

I try to figure it out by looking at the patterns but i'm clueless about the formula.

Anonymous said...

The next 2 numbers are 10 and 12?

Vrungel said...

This is EKG sequence where first two numbers are 1 and 2 and then every next is the smallest number not already used that shares a factor with the preceding member. So next number would be 15.