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?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

Can you identify the hidden rebus in the image below?

Why Aeroplane windows are round?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Give it food and it will live; give it water and it will die.

What goes up but never comes down?

I shave every day, but my beard stays the same. What am I?

1. What does:
TIM JOB
represent?

2. What does:
MO_ _
represent?

Count the number of triangles in the picture below: