Answer: Python Puzzler #3984

The answer is C. The program prints:

1
2
3
Meow
5
6

This answer was checked by running the program for real.

Why?

Every number that divides exactly by 4 (remainder 0) is replaced by ‘Meow’. All the others are printed as they are.

Trace table

A trace table follows the program step by step. Here’s this one:

numbernumber % 4printed
111
222
333
40Meow
515
626

The code again

for number in range(1, 7):
    if number % 4 == 0:
        print("Meow")
    else:
        print(number)

Try it: change one number in the program and predict the new output before you run it.