Answer: What Comes Next? #389

The answer is C: 66.

The rule

Add 9 each time.

The pattern as Python code

Here is a tiny Python program that follows the same rule. Type it into IDLE and run it to print the whole pattern, including the answer.

number = 12
for step in range(7):
    print(number)
    number = number + 9

When you run it, Python prints:

12
21
30
39
48
57
66