It comprises roots which nobody sees, Much taller than those trees, Up and up it goes, Still it never grows?
Can you find the missing piece of the Porsche?
John enters a small room. The Door Closes. When the door opens, John is in a larger room. Explain?
I don't get anymore wetter, no matter how much rain falls on me.
I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?
How many sides does a circle have?
How can you take 2 from 5 and leave 4?
I am a white box having no key or lid. Yet there is a golden treasure inside it. What Am I?
I’m orange, I wear a green hat and I sound like a parrot. What am I?
What month of the year has 28 days?
A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.