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The GCD is associative. Which expression equals gcd(a, gcd(b, c))?

Agcd(a x b, c)
Blcm(a, b, c)
Cgcd(gcd(a, b), c)
Dgcd(a, b) + c
Answer & Solution
Correct answer: C. gcd(gcd(a, b), c)
Associativity lets the three numbers be grouped in any order when taking the GCD.
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