Which Travels Faster? Solve below famous picture riddle:

Buy me, smell me or deliver me, I do not change.

Who am I?

Replace the question mark with the number below given a simple math problem.

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

Can you find out which options fits best with the missing column?

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

There are a hundred statements.

First person says: At least one of the statements is false.

Second person says: At least two of the statements is false.

Third person says: At least three of the statements are false.

Fourth person says: At least four of the statements are false.

..

..

..

Hundredth person says: At least a hundred of the statements are false.

Analysing it, how many statements do you think are false and how many are true?

There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.