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

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

Paul's height is six feet, he's an assistant at a butcher's shop and wears size 9 shoes. What does he weigh?

What goes up but never comes down?

One day, I thought of ways that can be used for creating a palindrome. So I decided that I will turn into a larger number by adding the reversed digits to the original number and keep doing it till I finally obtained a palindrome.

I am not sure if this process will always result in a palindrome eventually but I was able to produce a four-digit palindrome. Can you guess my starting number?

Can you guess the name of the month by looking the below rebus ?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Move three sticks of the spiral below to form a square.

If two's company, and three's a crowd, then whats four and five ?