Be active and find the killer in the picture Riddle below.

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?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Imagine you are in a room with no windows or doors. How will you get 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.

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

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

What Time Should the last watch show in the below figure?

Find the hidden tiger in the given optical illusion ?

John was piloting a plane behind a car but was never able to overtake it. Why?