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There is no highest common multiple of any two or more numbers, for whatever multiple is stated, their LOWEST common multiple can be added to get an even higher common multiple.
However, there is a highest common FACTOR (HCF) which is the largest positive number that divides all the numbers without a remainder, and a LOWEST common multiple (LCM) which is the smallest number into which all the numbers divide without a remainder.
For 108, 54, 90:
hcf(108, 54, 90) = 18
lcm(108, 54, 90) = 540
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What are the greatest common factor of 54 and 90?
The greatest common factor of 54 , 90 = 18
The greatest common factor of 72 and 54?
The GCF is 18.
What is the greatest common factor of 72and 54?
The GCF is 18.
What is the greatest common factor of 20 and 54?
The greatest common factor of 21 and 54 is 3. The greatest common factor is the highest number that divides exactly into two or more numbers. factors of 21: 1, 3, 7, 21 factors of 54: 1, 2, 3, 6, 9, 18, 27, 54 The greatest common factor of 21 and 54 is 3.
What is the greatest common factor of 54 18 and 42?
The GCF of 18, 54, and 72 is 18.The GCF is 18.
