If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?
Why did Navjot Singh Sidhu put the new January calendar in the freezer
I am white when I am dirty, and black when I am clean. What am I?
Name a key which is hardest to turn.
What's the next in the series? H, Be, F, S, Mn, Kr, In, Gd, Tl, ?
I am quite hot but become too cold if you remove the first two letters. What am I?
They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?
A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train. How did it happen?
A bomb goes off. Carnage. One person, only a few feet away, survives! How can this be?
How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?
He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
