Answer:
Step-by-step explanation:
To make it easy let's list the integers that are beetwen 15 to 30 inclusive :
15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30
- the numbers that are multiples of both 5 and 3 are ending with 5 and 0 and the sum o their digits is a multiple of 3
- 15,30 oly the values
the the whole interval ]15,30[ is the answer
