Which of the following pairs of numbers is co-prime with each other?
101 and 77
Two numbers are co-prime when their greatest common divisor equals 1, i.e., they share no prime factor.
Check 101 and 77: 101 is a prime number and 77 = 7 x 11, so 101 does not divide 77 and shares no prime with it. Their GCD is 1, making them co-prime.
Hence, the co-prime pair is 101 and 77.
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