Replace the question mark with the correct number in the below-given picture?

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

During an experiment, a guy throws a bouncy ball from a 100 feet tall building. The ball has a specific characteristic. Every time it hits the ground, it bounces up halfway.

How many bounces do you think the ball will make before it comes to a stop ?

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

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

Imagine a box with two cogwheels, one big with 24 teeth and one small with 8 teeth. The big one is firmly attached to the center of the box which means it does not turn or move while the small one rotates around the big one.

How many times do you think that the smaller wheel will turn compared to the box when it turns once around the big one?

What famous saying does this rebus mean?

COME SERVED <---
COME SERVED
COME SERVED
COME SERVED
COME SERVED

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

What has to be broken before you can use it?

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