Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

Why do you find that most of the buildings are deprived of the 13th floor?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

Two fathers and two sons went fishing one day. They were there the whole day and only caught 3 fish. One father said, that is enough for all of us, we will have one each. How can this be possible?

There was a greenhouse.
Inside the greenhouse, there is a white house.
Inside the white house, there is a red house.
Inside the red house, there are lots of babies.

What is It?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?