**If a Door Number Fitter Riddle** is very popular tricky riddle on the internet. Here is the correct answer with proper explanation to this **“If A Door Number Fitter Riddle”**. In this riddle you need to find the total number of 9’s which comes between 1 to 100.

**Riddle:**

Right…if a door number fitter needed to fit the numbers of a 100 houses 1 to 100, how many 9’s would he need?

**Answer:**

The answer to **“If a Door Number Fitter Riddle”** is** “20.”**

## If A Door Number Fitter Riddle Explanation:

To count the total number of 9’s which comes between 1 to 100, for that we will list all the numbers which has digit 9 in them and then we will count them all to get the correct answer.

If you count all the digits which has 9 in them ranges from 1 to 100 you will find that there are only 19 such numbers. You must be thinking then how the answer 20 is possible.

For that we have to see each individual number:

9, 19, 29, 39, 49, 59, 69, 79, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99 = 20

The number 99 has 2 nines in it and we will count then individually and our answer becomes 20.

## In a New Hotel Containing 100 Rooms Riddle:

**Riddle:**Riddle me this…in a new hotel containing 100 rooms, tom was hired to paint the numbers from 1-100 on the doors. how many times will tom have to paint the number 8?

### In a New Hotel Containing 100 Rooms Riddle Answer:

The answer to **“In a New Hotel Containing 100 Rooms Riddle”** is** “20.” **The answer remain the same as the above riddle. The method for solving this riddle also remains the same. First count all the digits containing number 8.