Can you count the number of triangles in the given picture?

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?

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

Count the number of lines in the image below ?

What does below rebus means ?

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

Out of four images which one is the odd one out?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.