No, 42 and 68 are not relatively prime. They have more than the number 1 as a common factor.
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No, because 1 is not their only common factor. The number 3 is also a common factor.
Yes, 96 and 105 are relatively prime because they have no prime factors in common.
No. To be relatively prime, numbers have to have a GCF of 1. Numbers ending in 5 are divisible by 5.
It is: 630 by finding the prime factors of the given numbers
30, 42, 66, 78, 102, 105, 114, 138 all have exactly three distinct prime factors.
It can be. 21 is relatively prime with 32.