because the closest number between these 2 numbers is 15
There is no such thing as a least common number.
15
The word "least" is a superlative. What that means is that there cam be only one such number. Therefore 2, 3 and 5 have only one least common multiple, not least common multiples! LCM(2, 3, 5) = 30.
30 is divisible by, and is the least common multiple of, 2, 3, and 5.
The three numbers have no common factors, so the LCM is 3 x 4 x 5 = 60.
The least common multiple of 3, 5, and 11 is 165.
The lcm is 60
The least common multiple of 3 , 5 , 45 = 45
The least common multiple of 3 , 2 , 5 = 30
The least common multiple of 3 , 5 , 2 = 30
The Least Common Multiple of 5, 15, and 3 is 15.
The least common multiple of 3 , 5 , 4 = 60
The least common multiple of 3, 5, and 7 is 105.This is the first number that each of these numbers have in common when finding the multiples of each number. You begin by taking each number and multiplying the number by 1, 2, 3, 4, 5, etc. until you come up with a number that is common to each of the numbers (3,5 and 7). In this case, the first number that the three numbers had in common happened to be 105. The number 3 had to be multiplied 35 times (35x3=105); The number 5 had to be multiplied 21 times (21x5=105); and the number 7 had to be multiplied 15 times to have a number in common with the other two numbers (15x7=105).
45 is the least common multiple of 3, 5 and 9.