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

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

There is a movie name hidden in the picture that is attached with this question. Can you find out which movie is it?

Before Mount Everest was discovered, what was the highest mountain in the world?

Count the number of triangles in the below picture?

Using eight eights and addition only, can you make 1000?

A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

What is the unique property of the following words ?
* Revive
* Banana
* Grammar
* Voodoo
* Assess
* Potato
* Dresser
* Uneven