If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

The two towns are exactly 100 km apart. John leaves City A driving at 30 km/hr and Jacob leaves City B half an hour later driving at 60 km/hr. Who will be closer to City A when they meet?

Why do Chinese men eat more rice than Japanese men do ?

Why are all black people so quick ?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

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?

4 fathers, 2 grand-fathers and 4 sons went to watch the movie.What is the minimum number of tickets they need to buy ?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

I am white when I am dirty, and black when I am clean. What am I?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?