Determine whether two positive integer numbers are coprime

	;; P33 (*) Determine whether two positive integer numbers are coprime.
	;; Two numbers are coprime if their greatest common divisor equals 1.
	;; Example:
	;; * (coprime 35 64)
	;; T
	#lang racket
	(provide coprime?)
	(define (coprime? a b)
	(= 1 (gcd a b)))

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