What number when divided in half becomes zero?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

I am a word of 12 alphabets.

* Alphabets 12, 4, 7, 2, 5 : Eastern beast of burden
* Alphabets 1, 8, 10, 9 are street made famous by Sinclair Lewis.
* Alphabets 11, 3, 6 are past.

On whole it means a person suffering from delusions of greatness.

What Is it ?

Find the number of squares in the below-given picture.

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

Replace the question mark in the picture below.

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

What Adam and Eve do not have but the rest of the people have?