When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

What begins with T, ends with T, and has T in it?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

The captain of a ship was telling this interesting story: "We travelled the sea far and wide. At one time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly." How can that be possible?