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

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

How many triangles can you count in the figure given?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

My location can be determined by the below rebus.
So where am i ?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

You are in a land where thirty men and two women were dressed in classic black and white dresses.
They begin to fight as soon as any of them move.

Where are you?

If you say my name, I will no longer exist. What am I?

As a whole I am both
safe and secure.

Behead me and I become
a place of meeting.

Behead me again and I am
the partner of ready.

Restore me, and I become
the domain of beasts.

What am I?