30
45
60
45, 60, and 75
45, 60, and 75
Multiples of 3 include 3, 6, 9, 12, 15 3 and 6 are consecutive. 6 and 9 are consecutive. 9 and 12 are consecutive and so on.
They are: 14+15+16 = 45
18, 15, 12, 9, 6, 3
Since 3 is a factor of 15, the first three common multiples of 3 and 15 are 15, 30, and 45.
You can always guess and check! When they are consecutive, it means they must be the next odd integer up from the last. For this, it is 11, 13, 15. 11+13+15= 39
15 & 20 have an infinite number of Common Multiples; the first three are 60, 120 and 180.
15, 30, 45
The sum of the squares of the three consecutive integers 11, 13, 15 = 515
15.15
The answer depends on where the "next" starts from!