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?

What English word has three consecutive double letters?

There is a box. The area of its top is 240 square units, the area of the front is 300 square units and the area of the end is 180 square units.

Can you calculate the dimensions of this box with the given data?

Decode below rebus
D
N
A
T
S , D

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

There are forty elephants and they have forty-fore heads. How can this be possible?

I know a nine-letter word having only one vowel.
Do you ?

How could a baby fall out of a twenty-story building onto the ground and live?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?