Answer:

The missing number in the sequence can be found by observing the pattern of the numbers.

Starting from 3, we add 6 to get to 9. Then, we add 6 again to get to the next number in the sequence. Continuing in this pattern, we get:

3, 9, 15, 24, 33, 43, 54

Therefore, the missing number in the sequence is 15.

Answer:

16

Step-by-step explanation:

3+6=9

9+7=16

16+8=24

24+9=33

33+10=43

43+11=54