The lowest common denominator of any two or more whole numbers, such as 15 and 36, will always be one (1) because 'common denominator' refers to the denominators of two or more fractions or mixed numbers, not whole numbers. So, a set of whole numbers (x,x) would have to be converted to their fraction equivalents, i.e., x/1, which will always yield a denominator of 1.
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If you mean the lowest, it's 2
LCD(9, 1, 4) = 36
Factor each number to see if they have common factors:21 = 3*736 = 3 *12The LCD is, 36*7 or 21*12, 252.
36
The lowest common factor of 12, 18 & 36 is 1.