Why is a river so rich ?

What you cannot hold but it is yours?

The following "Brain Bat" means Slow Down.
S
L
O
W

Using the same logic, can you tell us what does the following Brain Bat means ?
E
V
I
G

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

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

John has played 50 ODI's and his average is 50. How many runs should he score in his 51st ODI, so that his average score jumps to 51?

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

There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?

When it is alive we sing, when it is dead we clap our hands. What is it?

Can you find the missing piece of the Porsche?