There can be multiple answers to this question but an answer that works is 6. This works because double of 6 is 12 and 12 is less than 33. So does anything below 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, but not 17 because double of 17 is 34 which is over 33. So your number is under 16.
