There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

Using Only Five 5's and any mathematical operator make sum as 37

The dirtier I get, the whiter I look. Who am I?

What has a bottom at the top?

What word does this rebus represent?

meta meta
meta meta

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

What has lots of eyes, but can’t see?