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In the Euclidean algorithm, the pair (a, b) is repeatedly replaced by which pair?

A(a + b, b)
B(b, a / b)
C(a x b, b)
D(b, a mod b)
Answer & Solution
Correct answer: D. (b, a mod b)
Each step swaps in the remainder of dividing a by b until the remainder is 0.
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