What do you get if you add 2 to 100 four times?

How many triangles can you find in this given picture?

Four cars come to a four-way stop, each coming from a different direction. They can’t decide who got there first, so they all go forward at the same time. All 4 cars go, but none crash into each other. How is this possible?

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

What does it mean?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

Can you name four days which start with the letter 'T'?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

10 people came into a hotel with 9 rooms and each guest wanted his own room. The bellboy solved this problem.
He asked the tenth guest to wait for a little with the first guest in room number 1. So in the first room, there were two people. The bellboy took the third guest to room number 2, the fourth to number 3, ..., and the ninth guest to room number 8. Then he returned to room number 1 and took the tenth guest to room number 9, still vacant.
How can everybody have his own room?