A riddle problem is a question or statement intentionally phrased so as to require ingenuity in ascertaining its answer or meaning, typically presented as a game.  Below is a list of the past problem of the week riddles in descending chronological order.

Riddle: If a boy blows 18 bubbles, Then pops 6 eats 7 and then He pops 5 and blows 1. How many are left?
Riddle: The ages of a father and son add up to 66. The father's age is the son's age reversed. How old could they be? (3 possible solutions).
Answer: 51 and 15. 42 and 24. 60 and 06.
Riddle: What arithmetic symbol can be put between 2 and 3 so that the resulting number is greater than 2 but less than 3?
Answer: A decimal point. 2.3 is greater than 2 and less than 3.
Riddle: Find the four digit number in which the first digit is one fourth of the last digit, the second digit is 6 times the first digit, and the third digit is the second digit plus 3. What is it?
Riddle: What two whole, positive numbers have a one-digit answer when multiplied and a two-digit answer when added?
Riddle: There is a clothing store in Bartlesville. The owner has devised his own method of pricing items. A vest costs \$20, socks cost \$25, a tie costs \$15 and a blouse costs \$30. Using the method, how much would a pair of underwear cost?
Answer: \$45. The pricing method consists of charging \$5 for each letter required to spell the item.
Riddle: What weighs more, a pound of feathers or a pound of stones?
Answer: The same. They both weigh a pound!