you add 10 to each number in the series of three. If you break the pattern into groups of three you will see 8-14-5 then 18-24-15 then 28-34. . . so 8+10=18+10=28, 14+10=24+10=34, 5+10=15+10=25, so...
first you add 1 by 5 and get 6 then .add 6 by 2 and get 8 .and add 8 by 3 and get 11.add 11 by 4 get 15.add 15 by 5 get 20 its simple just keep adding each number by 1,2,3,4,5 and if the pattern...
assuming you mis-typed the 15 and instead it should be a 25, these are simply the squares of the number's position in the line. 12 = 1 22 = 2 32 = 9 42 = 16 52 = 25 (assume is what you meant) 62 = 36...