Riddle: If eleven plus two equals one, what does nine plus five equal?
Answer: 11 o'clock plus 2 hours = 1 o'clock 9 o'clock plus 5 hours = 2 o'clock
Riddle: 0,1,2,3,4,5,6,7,8,9 How can you use the digits above once each only to compose two fractions which when added together equal 1?
Answer: 35/70 + 148/296 = 1
Riddle: 'How much is this bag of potatoes?' asked the man. '32lb divided by half its own weight,' said the green grocer. How much did the potatoes weigh?
Answer: 8lbs.
Riddle: How can you insert the numbers 1-9 inclusive each only, into the calculation to arrive at the answer 100? ( - ) + + - - - = 100
Answer: ( 7 - 5 )²  + 96 + 8 - 4 - 3 - 1 = 100
Riddle: How many times does the long hand of the clock pass the short hand between midnight one day and midnight the following day? As both hands are together at the starting time of midnight this does not count as a pass.
Answer: 21.
Riddle: What do the rich need and poor would be helpless with?
Answer: Nothing.
Riddle: Imagine you are in the days of the dinosaurs, and one is chasing after you, about to eat you... What do you do?
Answer: Easy, Stop imagining!
Riddle: You were in the garden. There are 34 people in the yard. You killed 30. How many people are in the garden?
Answer: Only 1, the killer.  If he killed 30 the other 4 would have run away so the killer would be the only one left.
Riddle: Our dinner guests cry that we are evil, when they notice their place in the meal. But its no big deal why; we are just one big happy tribe! And we get reall fed up with people! Who, What or Are we?
Answer: Cannibals!
Riddle: How do you fix a broken jack-o-lantern?
Answer: With a pumpkin patch.