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

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

What will you call your mother's brother's brother-in-law?

If 21x = 79x, what is the value of x?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

Can you count the number of quadrilaterals in the picture below?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Can you find out which options fits best with the missing column?

Find out the number of circles in the given picture having Illusion

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?