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
The least common multiple of the numbers 2, 5 and 15 is 30.
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.
To find pairs of numbers with 10 as their least common multiple, we need to consider the prime factors of 10, which are 2 and 5. One pair of numbers could be 2 and 10, as their least common multiple is 10. Another pair could be 5 and 10, as their least common multiple is also 10. These pairs have 10 as their least common multiple because they share the prime factors of 10.
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!
The least common multiple of 2 , 5 , 9 = 90
The least common multiple of the numbers 5 and 10 is 10.
The least common multiple of the numbers 234 and 5 is 1,170.
The least common multiple of the numbers 34 and 5 is 170.
The least common multiple of the numbers 7,811 and 5 is 39,055.
The least common multiple of the numbers 5 and 38 is 190.
The least common multiple of the numbers 611 and 5 is 3,055.
The least common multiple of 3, 5, and 11 is 165.
The least common multiple of the numbers 2, 5 and 15 is 30.
The least common multiple of the numbers 2, 4 and 5 is 20.
The least common multiple of the numbers 3, 12 and 5 is 60.
The least common multiple of the numbers 8, 11 and 5 is 440.
The least common multiple of the numbers 9 and 5 is 45.