Grrrrrrrrrrrrrrrrrr I hate mathematics
Originally Posted by neo_viI too thought in the same angle. But some thing went wrong
1, 2, 7, 12, 19, 42
The diff b/w 1st and third is 6 (7-1)
The diff b/w 5th and 3rd is 12 (19-7)
So,The diff b/w 7th and 5th should be 18 (37-19) which follows multiples of 6.
the diff b/w 4th and 2nd is 10 (12-2)
the diff b/w 6th and 4th is 30 (42-12)
Your logic would be correct if the 6th number is 32 instead of 42 so that the diff b/w 6th and 4th is 20 (32-12) i.e then 2nd difference series will be 10,20,30 like first difference series 6,12,18.
Bad Luck neo_vi, but nice try