or maybe you can do the equation 14.5 x 2.9 and that will get you 42.05. Then you subtract 11 from that answer. Which will get you... 42.05 - 11 = 31.05
so the pattern is they add 2 then they add 4 then they add 8 then the add 16 basically they are double the number being added each number so the missing number is 14
