alleryA rational number p/q (in lowest terms) has a terminating decimal expansion if and only if the prime factors of q are:
Aonly odd primes
Bany primes
Conly 3 and/or 7
Donly 2 and/or 5
Answer & Solution
Correct answer: D. only 2 and/or 5
p/q terminates iff q's only prime factors are 2 and/or 5.
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