When I got four, I have it none. When I got two, I have it some. When I got none, I have it all. What is it?
It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?
I have eight fingers and two thumbs but I do not live. What Am I?
What is at the end of a rainbow?
What runs around the whole yard without moving?
People put me on the table and cut me but do not eat me. What am I?
I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?
I taste better than I can smell. Who am I?
It is deaf, Dumb and Blind!!! Still, always tells the truth. What is it?
What is always in front of you but can’t be seen?
Which English verb becomes past tense just by rearranging the letters?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.