45
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The Least Common Multiple (LCM) for 9 15 is 45.
The biggest common divisor of 9 and 15 is 3. To find the least common multiples of 9 an 15 you should multiply these numbers and divide the result by their biggest common divisor. 9x15/3=45
The Least Common Multiple (LCM) for 9 21 15 is 315.
There is an infinite number of common multiples for 9 and 15. 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 9 and 15 is 45.
45