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

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

Why did Buffon take the goal with him after every Juventus match?

Can you find out the remainder when 3^300 is divided by 5?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

We are a group of eight brothers. We consider the weak, yet we protect the king in every battle. If we move ahead, we never turn back. Who are we?

It is a six-letter word.
The first four letters are me.
The second and last letters are the same.
The fourth second and last letter is payment.

Who is it?

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.