Hey! You see at first I got confused but I looked at it closer. This is an arithmetic sequence and so the number in-between would have to be the same number away from 29 and 33. The answer is B! It is 2 away from both 29 and 33 Hope this helps!
In this sequence, the missing number is halfway between 29 and 33. To find it, we need to find the average between the two: [tex] \frac{33 + 29}{2} \\ = \frac{62}{2} \\ = 31[/tex] 31 is the missing number.
