It's the 12th term first you must have to fine the common difference of the sequence which is 3 so 4-3=1, 1-3=-2, -2-3=-5, -5-3=-8, -8-3=-11, -11-3=-14, -14-3=-17, -17-3=-20, -20-3=-23, -23-3=-26, -26-3=-29 then count how many terms and that's the answer.
