Using Only Five 5's and any mathematical operator make sum as 37

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

On a bright sunny day, two fathers took their son fishing in the lake. Each man and son were able to catch one fish. When they returned to their camp, there were only three fishes in the basket. What happened?

PS: None of the fish were eaten, lost, or thrown back.

What English word has three consecutive double letters?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?