It's a test that will check your IQ. Suppose you have one 11 minute hourglass and one 13 minute hourglass. Can you measure exactly fifteen minutes using them ?
Rearrange the letters in "new door" to make one word.
Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?
How many times can you subtract the number 5 from 25?
There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What colour are the stairs?
How can you write nineteen in a manner that if we take out one, it becomes twenty?
What does does this rebus picture means ?
How is the moon similar to a dollar?
Can you solve the below algebraic mathematical equation? (J+O+I+N+T)3 = JOINT
An ape is trying to climb on a pole that is 60 feet high. Due to the slippery surface, the ape climbs 3 feet in a minute only to slip back 2 feet. How much time do you think the monkey will take to reach the top of the pole?
Can you start the fire using two pieces of wood?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.