Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

You are an expert on paranormal activity and have been hired to locate a spirit haunting an old resort hotel. Strong signs indicate that the spirit lies behind one of four doors. The inscriptions on each door read as follows:

Door A: It's behind B or C
Door B: Its behind A or D
Door C: It's in here
Door D: It's not in here

Your psychic powers have told you three of the inscriptions are false, and one is true. Behind which door will you find the spirit?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

How can one talk without saying a single word?

For an extra income, John decided to work at a Hotel for one hour daily. The manager offers him that they will pay him $11 after every 11 days.
However, John offered a different proposition to the manager. The offers stand as:
He will be paid just a penny on his first day.
Two pence will be paid on the second day,
Four pence will be paid on the third day.
And so on till the 11th day.

Should the Hotel manager accept his offer?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C