I am thinking of a 2-digit number. It is a common multiple of 5&9. The digits in the ones place is smaller than the digit in the tens place. What is the number I am thinking of?
The common multiples of 5 and 9 are 45 and 90. However, we are looking for a 2-digit number where the digit in the ones place is smaller than the digit in the tens place. Therefore, the number must be 45.
