What is the centre of gravity?

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?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

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?

Sachin bought a car with a strange 5 digit numbered plate.The water image of the number is 78633 more than my car number. All the digits of car number are distinct.

What is the original number on number plate?

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?