What number comes next in this sequence: 7 8 5 5 3 4 4 _
I can write cow in 13 letters. Can You?
A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result. Can you find how bias is the floor in this case?
It is always ahead of me yet I can never see it. What is it?
A sundial has the fewest moving parts of any timepiece. Which has the most?
Why is a river so rich ?
In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?
Imagine you are in a room with no windows or doors. How will you get out?
A woman shoots her husband. Then she holds him under water for over 5 minutes. Finally, she hangs him. But 5 minutes later they both go out together and enjoy a wonderful dinner together. How can this be?
I always drive my customer away. Who am I?
A man died, leaving $10,000,000 for his widow, 5 sons and 4 daughters. Each daughter received an equal amount, each son received twice as much as a daughter, and the widow received three times as much as a son. How much did the widow receive?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.