The answer is 75.
Let's look at your problem shall we:
Odd number: It should end with the numbers 1,3,5,7, and 9.
The number is less than 100: It should be from the number 1-99
Sum of digits: 12
Multiple of 15: 15, 30, 45, 60, 75, and 90.
We can rule out 30, 60, and 90 because they are even.
1+5 = 6; 4+5=9; 7+5 = 12
You are left with 75.
Considering the multiples of 15, the number is 75.
The multiples of 15 is the set composed by these following factors:
15 x 0 = 0
15 x 1 = 15
15 x 2 = 30
15 x 3 = 45
15 x 4 = 60
15 x 5 = 75
The sum of the digits of 75 is 7 + 5 = 12, and it also is an odd number, hence 75 is the number.
You can learn more about multiples at https://brainly.com/question/19808269
