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

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

Can you find the 09 errors in the picture below?

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?

Can you name an animal whose killing cannot be performed without spilling your own blood?

If eleven plus two equals one, what does nine plus five equal?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?