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

There is something which you can be arrested for attempting but not for successfully completing.

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

1 dollar = 100 cent
= 10 cent x 10 cent
= 1/10 dollar x 1/10 dollar
= 1/100 dollar
= 1 cent

=> 1 dollar = 1 cent

solve this tricky problem?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

If a wheel has 54 spokes, how many spaces are there between the spokes?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

What is the last thing you take off before bed?