I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

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?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

It is a 5 letter word if you take away first letter it is something you get from sun, if you remove second letter you will get something to eat, if you remove third letter you get a word you use in pointing at and if you remove the fourth letter you get something to drink. What is it?

In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?

What brings you down but never up?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?