Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?
If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?
Count the squares in the matchstick puzzle below?
I am never scared but became petrified and can’t live in a house but would die to make one. What am I?
You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'. S E Q U E N C _
I am the fastest animal but cannot climb the tree. What am I?
What's the next in the series? H, Be, F, S, Mn, Kr, In, Gd, Tl, ?
John is looking at Jenifer, but Jenifer is looking at Jacob. John is married, but Jacob is not. Is a married person looking at an unmarried person ?
I am white when I am dirty, and black when I am clean. What am I?
The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?
It is always ahead of me yet I can never see it. What is it?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
