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

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

There are three houses in a straight row. One is red, one is blue, and one is white. The red house is left of the middle. The blue house is right of the middle. Where's the white house?

A deaf and mute man goes to the train station. Tickets for the train are 50 cents each. The man goes to the ticket booth and hands the man inside just a dollar. The man in the booth hands him two tickets.

How did the man in the booth know to give him two tickets without even looking at him?

I have feet, but no legs. Which animal Am I?

If six children and two dogs were under an umbrella, how come none of them got wet?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house.

Who am I?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

How can you write nineteen in a manner that if we take out one, it becomes twenty?