Question

Identify the pattern in the list of numbers. Then use this pattern to find the next number. 3, 9, 12, 21, 33, 54, ​___

Answer 1

The pattern is add by 6 then by 3 then by 9 then by 12 then by 21 then by 33
the answer is 87

Answer 2

The pattern is to take the sum of the previous 2 numbers,
3+9=12
9+12=21
12+21=33
etc.
Therefore the next number is 33+54=87
Final answer:
87
Hope I helped :)