16 because 2 + 2= 4, 4 + 3 =7, 7 + 4 = 11, so logically 11 + 5 = 16.
11 comes next.
The pre-penultimate element of the series.
10
57
1204
The series seems to be "add 3," so the next number in the series would be 12 followed by 15.
The number 7 comes next.
One number does not make a sequence (nor a series).
There is no series after GT yet.
7 then 7 then 5 then 6
T
16.