The greatest common multiple of any set of integers is infinite.
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There is no such thing. Perhaps you mean:* The greatest common factor (gcf),
* Or the least common multiple (lcm), also known as the least common denominator if used for fractions.
There can be no GCM (Greatest Common Multiple). Suppose a GCM exists and suppose it is x. That is, x is the GCM of 7 and 13, then 2x is a multiple of both 7 and 13 and is greater than x. This contradicts the statement that x is the GCM. So x cannot be the GCM.
The GCM of any set of numbers is infinite.
The GCF is 5. The LCM is 225. The GCM is infinite.
1.5
18 is increased to 45: 45-18=27 27/18 X100 1.5X100 150%