# My number has 2 hundred. The tens digit is 9 more than the ones digit. Find the number.

We will use the concept of a number system in order to find the required number.

## Answer: The required number is 290.

Let us see how we will use the concept of the number system in order to find the required number.

**Explanation:**

It is given that the number has two hundred. Hence, the number on the hundreds place is 2.

Also, it is given that the tens place digit is 9 more than the units place digit.

Therefore, one's place digit has to be zero as the ten's place has to lie between 0-9.

This makes the ten's place digit 9