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

A Shopkeeper sold a few chickens to four different customers on a particular day. It was such that each customer purchased half of the remaining chickens and half the chicken more.

Can you find out how many chicken were sold by the shopkeeper on that day if we tell you that the fourth customer bought a single chicken ?

O_er_t_o_

Complete the missing letters of the given word.

What has no start, end, or centre?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

If 1+9+8=1, what is 2+8+9?

Can you write down eight eights so that they add up to one thousand?

It belongs to you, but other people use it more than you do. What is it?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

What has 88 keys?