11 is the smallest 2-digit Prime number and 97 is the greatest 2 digit prime number, so their difference is 86
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The range
The least common multiple, or LCM, is the smallest integer that all the members of a given set of numbers will divide into evenly with no remainder. The greatest common multiple is infinite.
The greatest common factor of the numbers 120, 180 and 240 is 60. The GCF can't be any larger than the smallest difference between the numbers, which is 60. It is easy to see that 60 is a factor of each of the numbers in the set, so it is the GCF.
Range, in mathematics, is the difference between the largest and smallest numbers in a given set.
The maximum difference is 8, between 89 and 97.