In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

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 is something which you can be arrested for attempting but not for successfully completing.

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

What does this Rebus Picture means ?

What is next number in the pattern below:

131 517 192 123 ?

He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?

How many times can you subtract the number two from the number fifty?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

If two's company, and three's a crowd, then whats four and five ?