What has one letter and starts with an E?
While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side. How many houses are there between your home and your grandmother's home?
How many sides does a circle have?
How can you write nineteen in a manner that if we take out one, it becomes twenty?
I am white when I am dirty, and black when I am clean. What am I?
If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?
Give it food and it will live; give it water and it will die.
I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?
I have four wings but can't fly. I express no emotions. I am found on the exact spot every time you look. I keep toiling away with a little sound. Do you know what am I?
I am soft and cuddly that soothe your heart. But, If you pick my last name I am going to tear you all apart. Who am I?
If eleven plus two equals one, what does nine plus five equal?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.