A multiple of 20 3 digits my hundreds digit and tens digit add to make 9 hold of me is less then 100
To find a multiple of 20 with 3 digits where the hundreds digit and tens digit add up to 9, we can start by listing the possible values for the hundreds digit and tens digit.
Since the sum of the hundreds and tens digit needs to be 9, we can have the following combinations: (1, 8), (2, 7), (3, 6), (4, 5), (5, 4), (6, 3), (7, 2), (8, 1), (9, 0).
Next, we need to determine the units digit such that the number is a multiple of 20. A multiple of 20 always ends in either 0 or 0. Therefore, we can choose between 0 and 5 for the units digit.
Now let's combine the possible values for the hundreds digit, tens digit, and units digit to form the desired multiples of 20:
For (1, 8), the multiple of 20 can be 180 or 280.
For (2, 7), the multiple of 20 can be 270 or 370.
For (3, 6), the multiple of 20 can be 360 or 460.
For (4, 5), the multiple of 20 can be 450 or 550.
For (5, 4), the multiple of 20 can be 540 or 640.
For (6, 3), the multiple of 20 can be 630 or 730.
For (7, 2), the multiple of 20 can be 720 or 820.
For (8, 1), the multiple of 20 can be 810 or 910.
For (9, 0), the only possible multiple of 20 is 900.
From these possibilities, we can see that there are four multiples of 20 with 3 digits where the hundreds digit and tens digit add up to 9, and the whole number is less than 100. These numbers are: 90, 180, 270, and 360.