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

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

Tell me the Hindi name of a Vegetable which if we remove 1st word will become a precious Stone and by removing the last word it will become a sweet eatable.

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

What does this rebus riddle mean?

What does this rebus means ?

What number should come in place of the question mark below?