The more of this there is, the less you see. What is it?
I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?
Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?
What has many keys but can’t open a single lock?
It comprises roots which nobody sees, Much taller than those trees, Up and up it goes, Still it never grows?
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?
If eleven plus two equals one, what does nine plus five equal?
I go up and I go down. I go up towards the beautiful sky and down toward the green ground. I am present tense. I am past tense too Children love me. Who Am I?
Pronounced as one letter, And written with three, Two letters there are, And two only in me. I am double, I am single, I am black blue and grey, I am read from both ends, And the same either way.
What word begins and ends with an E, but has only one letter?
I am white when I am dirty, and black when I am clean. What am I?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
