I have Rs.50 and I spend it in the way as below.

What is the centre of gravity?

What is the longest word in the dictionary?

When is the top of a mountain similar to a savings account?

What does Alexander the Great and Winnie the Pooh have in common?

What is the end of everything?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

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?

An apple seller is hosting a competition. He offers 1000 apples and 10 boxes to the people who pass by. The challenge is to put those 1000 apples in the 10 boxes in such a manner that if he asks for any amount of apples, the person can directly give him the boxes or a combination of boxes. If the person can do it, he promises to give a thousand apples for free.

If you happen to pass by the apple seller, will you be able to win a thousand apples?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?