The LCM of 9,12, and 15 is 180.
Let's use prime factorization to see why?
9=32,
12=22 x3
15=3x5.
To find the LCM take 32 , 22 , and 5.
9x4x5=180 which is the answer. Note we took the largest exponent of each of the factors and their product is the LCM.
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60
The Least Common Multiple of 2 and 12 is 12.
The least common multiple of 12 , 62 = 372
The LCM of 3, 6, and 12 is 12.The least common denominator is the same as the least common multiple.The least common denominator is the smallest multiple divisible by 3, 6, and 12. Since 12 is divisible by 3, 6, and 12, and the smallest multiple of 12 is 12 x 1 = 12, that is the least common denominator or least common multiple.
The Least Common Multiple (LCM) for 6 7 12 is 84.