Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water. How many frogs are there on the log at this moment?
How many letters are in the alphabet?
I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?
What have one eye but still cannot see?
They came out at night, without being called. They lost at day, without being stolen. Who are they?
How can you write nineteen in a manner that if we take out one, it becomes twenty?
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?
How many sides does a circle have?
I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?
I get hot but I never sweat, I cook food but I am not a chef, I have a door but you can't enter me, I have a light but I am not a lamp. Who am I?
There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
