When 99 is considered higher than 100?

They are three errirs in this question. Can you find them?

Can you find a seven digit number which describes itself. The first digit is the number of zeros in the number. The second digit is the number of ones in the number, etc. For example, in the number 21200, there are 2 zeros, 1 one, 2 twos, 0 threes and 0 fours.

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

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

I am quite hot but become too cold if you remove the first two letters. What am I?

what's the probability of getting a king or a queen from a pack of 52 cards?

What makes this number unique: 8,549,176,320?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?