Replace the question mark with the correct number below.

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

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

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)

What is wrong in the below Picture?

What 5-letter word typed in all capital letters can be read the same upside down?

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?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

There were three women in all the swimming costumes!
One was happy and the other two were sad!
The happy one was crying and the sad ones were smiling.
Why was this?

I know a nine-letter word having only one vowel.
Do you ?