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The common denominator is usually the Lowest (or Least) Common Multiple of the numbers involved. Where two numbers have no common factors then the LCM is simply the product of those numbers. As 19 is a Prime number and has no factors in common with 18 then the common denominator is 18 x 19 = 342.
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Earn +20 ptsQ: What is the least common denominator of 18 and 13?
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What is the least common denominator of 42 and 18?
126
What is the least common denominator of 18 and 112?
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What is the most common denominator of 18 and 81?
There can be no greatest common denominator. If you have a set a numbers whose least common denominator is L then 2*L, 3*L, … are all common denominators. There is no end to that sequence and so no greatest.
What is the rename least common denominator of 13 and 518?
If 13 and 518 are both denominators, the LCD is 6734 If that's 1/3 and 5/18, the LCD is 18 and you can change 1/3 to 6/18
What is the least common multiple of 13 18 and 25?
The Least Common Multiple (LCM) for 13 18 25 is 5,850.
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