Answer: What Comes Next? #377

The answer is B: 69.

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 = 15
for step in range(7):
    print(number)
    number = number + 9

When you run it, Python prints:

15
24
33
42
51
60
69