Replace the question mark with the number below given a simple math problem.

What type of tree can I carry in my hand?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Can it be possible to build a house that has all its four walls facing towards the South?

It is always ahead of me yet I can never see it. What is it?

A generous owner of a company decided to give a bonus of $45 to every man and $60 to every woman on his birthday. But only one-ninth of the men and one-twelfth of the women were present to take the bonus.

Can you calculate the amount of money the owner spent if there were 3552 employees?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

Count the number of triangles in the picture below:

10+10 and 11+11 can give you the same answer.

Explain how?

What kind of band never plays music?