150 is the least common multiple
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150, 300, 450 and so on.
There is an infinite number of common multiples for 15 and 25. A common multiple of any two or more numbers is any number into which each of two or more numbers can be divided evenly (zero remainder). However, the least or lowest common multiple (LCM) of 15 and 25 is 75.
Multiples of 2: 2, 4, 6, 8, 10, 12, 14, ... Multiples of 5: 5, 10, 15, 20, 25, 30, ... Multiples of 10: 10, 20, 30, 40, 50, ... So the LCM (Least Common Multiple) is 10.
The LCM of 10, 15, and 25 is 150.
Thye all end in either 0 or 5 5 10 15 20 25 30 35 40 etc