A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?
I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?
Can you write down eight eights so that they add up to one thousand?
Can you find the missing piece of the Porsche?
John was piloting a plane behind a car but was never able to overtake it. Why?
I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?
On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off. How many candles Sayna have at the end?
How can you write nineteen in a manner that if we take out one, it becomes twenty?
What has to be broken before you can use it?
If eleven plus two equals one, what does nine plus five equal?
I go up and I go down. I go up towards the beautiful sky and down toward the green ground. I am present tense. I am past tense too Children love me. Who Am I?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
