Answer :
Numbers which are co- prime number which have greatest common factor one are 1, 7, 13, 17, 19, 23, 29, 31
Define co prime numbers.
Two integers a and b are coprime, comparatively prime, or mutually prime in mathematics if and only if the single positive integer that divides both of them is 1. As a result, every prime integer that divides a does not divide b, and the opposite is also true. This translates to having a greatest common divisor of 1 for them. Co-prime numbers are collections of numbers with just one common factor between them. Their highest common factor (HCF) is 1, which signifies. For Co-Primes to exist, there must be at least two Numbers. Relatively Prime Numbers is another name for co-prime numbers.
Given,
A date is called weird if the number of its month and the number of its day have greatest common factor 1.
Numbers which are co- prime which have greatest common factor one are:
1, 7, 13, 17, 19, 23, 29, 31
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