Spot what is wrong here in below Picture?

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

Through your logical capabilities, can you make 7 an even?

How many letters are in the alphabet?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

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

James ordered a fishing rod, priced at $3.56. Unfortunately, James is an Eskimo who lives in a very remote part of Greenland and the import rules forbid any package longer than 4 feet to be imported. The fishing rod was 4 feet and 1 inch, just a little too long, so how can the fishing rod be mailed to James without breaking the rules? Ideally James would like the fishing rod to arrive in one piece!

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

What is more useful when it is broken?