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Factoring each number into product of primes:
5=1 x 5
7 = 1 x 7
9 = 3 x 3, 1 x 9
The number 5 is a factor of 5 only; Include 5 in answer
The number 7 is a factor of 7 only; Include 7 in answer
The number 3 is a factor twice of 9; Include 3x3 in answer
Therefore,
LCM(5,7,9) = 3 x 3 x 5 x 7 = 315
Additional content regarding LCM may be referenced at
http://www.math.info/Arithmetic/LCM
What else can I help you with?
What is least common multiple of 2 5 and 15?
The least common multiple of the numbers 2, 5 and 15 is 30.
What is the least common multiple of 5 and 23?
The least common multiple of two numbers is the product of the two numbers divided by their greatest common factor. The greatest common factor of 5 and 23 is 1. (See related question "What is the greatest common factor of 5 and 23?" for this calculation.) So, the least common multiple is 5 x 23 ÷ 1 = 115.
What is the least common multiple of 5 and 31?
Well, honey, the least common multiple of 5 and 31 is simply the product of the two numbers since they are already prime and don't share any common factors. So, the least common multiple of 5 and 31 is 155. Easy peasy lemon squeezy!
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The least common multiple of 3 , 2 , 5 = 30
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The least common multiple of 2 , 5 , 9 = 90
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The least common multiple of the numbers 5 and 10 is 10.
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The least common multiple of the numbers 5 and 38 is 190.
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The least common multiple of the numbers 34 and 5 is 170.
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The least common multiple of the numbers 7,811 and 5 is 39,055.
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The least common multiple of the numbers 234 and 5 is 1,170.
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The least common multiple of the numbers 611 and 5 is 3,055.
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The least common multiple of 3, 5, and 11 is 165.
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The least common multiple of the numbers 2, 5 and 15 is 30.
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The least common multiple of the numbers 8, 11 and 5 is 440.
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The least common multiple of the numbers 3, 12 and 5 is 60.
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The least common multiple of the numbers 2, 4 and 5 is 20.
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The least common multiple of the numbers 9 and 5 is 45.
