3 * 7
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The least common multiple (LCM) refers to a multiple that is COMMON to two or more numbers. You have only one number in the question! The least multiple of a number is itself.
Fifteen is the least common multiple of three and five. 3 * 5 = 15 5 * 3 = 15
Since 45 is a multiple of 3, it is automatically the LCM.
The LCM or least common multiple of 3 and 5 is 15.The GCF or greatest common factor of 3 and 5 is 1.