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

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

Can you replace the question mark with the correct number in the below table sequence?

Three playing cards in a row. Can you name them with these clues? There is a two to the right of a king. A diamond will be found to the left of a spade. An ace is to the left of a heart. A heart is to the left of a spade. Now, identify all three cards.

Forwards I am heavy, backward I am not. What am I?

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

It is always ahead of me yet I can never see it. What is it?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

What kind of band never plays music?