The sum of the three consecutive multiples of 5 is 240 find these multiples.

Let the common multiple be x.
5x+(5x+5)+(5x+10)=240
5x+5x+5x+5+10=240
15x+15=240
15x=240-15
15x=225
x=225?15
x=15
Therefore first number= 5x=5?15=75
Second number=75+5=80
Third=80+5=85
75+80+85=240