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

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Which is the smallest number that you can write using all the vowels exactly once?

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

A girl rode into a tourist spot out of the city on Thursday. She loved the place and decided to stay for a few days. She stayed for four days and then she left for back home on Thursday.

How can this be possible?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

There are three Athletes (John, Tarun and Harish) and their individual Coaches (Jacob, Meenaxi and Priyanka) standing on the shore.
No Coach trusts their Athlete to be near any other Coach unless they are also with them.
There is a boat that can hold a maximum of two persons.
How can the six people get across the river?

A fresher was sitting in an interview. The interviewer said, "This is the last question of your interview. Tell me the accurate position of the centre of this table where your resume is kept."

How can he answer this question? What will you have answered to such a question?

John is a strange liar.

He lies on six days of the week, but on the seventh day, he always tells the truth.

He made the following statements on three successive days:

Day 1: "I lie on Monday and Tuesday."
Day 2: "Today, it"s Thursday, Saturday, or Sunday."
Day 3: "I lie on Wednesday and Friday."

On which day does John tell the truth?