Which is Odd One Out and why?

4377

3954

9862

8454

9831

Can you make four (4) nines (9) equal 100?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

I don't get anymore wetter, no matter how much rain falls on me.

What goes up but never comes down?

You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

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?

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

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

It belongs to you, but other people use it more than you do. What is it?