What is the centre of gravity?

A man dies of old age on his 25 birthday. How is this possible?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

Can you count the number of lines in the below picture?

What will you call your mother's brother's brother-in-law?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

Can you find the hidden animal in the picture below?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

No one wants to have it, but if one got it, he does not want to lose it. What is It?