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?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

There are three houses in a straight row. One is red, one is blue, and one is white. The red house is left of the middle. The blue house is right of the middle. Where's the white house?

French Police inspects a room where there are no windows, no doors, no tables and is almost empty expect there is just a puddle of water. They found a dead man who obviously hung herself from the ceiling, but they are not able to figure out how this had happened.

John and Jacob entered the crime scene and easily able to solve the case.

How did the man die?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

There was a strange boy who was born before his father. How can this be possible?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

Which wheel of car does not rotate when you turn your car right?

I make two people out of one. What am I?

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?