Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

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

You are driving down the road in your car on a wild, stormy night, when you pass by a bus stop and you see three people waiting for the bus

An old lady looks as if she is about to die.
An old friend who once saved your life.
The perfect partner you have been dreaming about.
Knowing that there can only be one passenger in your car, whom would you choose?

Why is it very easy to weigh a fish?

Can you make four (4) nines (9) equal 100?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

Can you solve the maths in the below-given picture equation?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?