What runs around the whole yard without moving?
John has eleven friends. He has a bowl containing eleven apples. Now He wants to divide the eleven apples among his friends, in such a way that an apple should remain in his bowl. How can He do it?
Look at me. I can bring a smile to your face, A tear to your eye, Or even a thought to your mind. But, I can't be seen. What am I?
What number do you get when you multiply all of the numbers on a telephone's number pad?
Nine marbles are arranged in the image below. Can you slide two marbles to form a square?
I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?
Look at this sequence from top to bottom. What is the next number in the sequence? 1 11 21 1211 111221 312211
What work can one never finish?
If EELS + MARK + BEST + WARY = EASY What does HELP + BARK + WARD + LEAD equal?
How many pluses should we put between the digits of 987654321 to get a total of 99, and where?
If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
