Riddle: A Smuggler with a bicycle carried to sack of sand with him every day. However every time he was checked at the border, the officer's let him through. Wait, what did the Smuggler smuggle?
Answer: The Smuggler used two sack of sand as a distraction. So that the officer wouldn't notice that he was smuggle the bicycles.
Riddle: If you look you cannot see me. If you see me you cannot see anything else. I can make anything you want happen, but later everything goes back to normal. What am I?
Riddle: A very famous chemist was found murdered in his kitchen today. The police have narrowed it down to six suspects. They know it was a two-man job. Their names are Felice, Maxwell, Archibald, Nicolas, Jordan, and Xavier. A note was also found with the body: '26-3-58/28-27-57-16'. Who are the killers?
Answer: Felice and Nicholas are the murderers. The numbers correspond to atomic numbers on the periodic table of elements: 'Fe-Li-Ce/Ni-Co-La-S'.
Riddle: Alone I am 24th. With a friend, I am 20. Another friend, and I am unclean. What am I?
Answer: The letter X. It is the 24th letter of the alphabet, XX in Roman numerals is 20, and XXX is a label for movies that are inappropriate (unclean).