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A rational number is any number that can be written in the form p/q, where p and q are integers and:
Aq can be anything
Bq ≠ 0
Cp ≠ 0
Dp and q are equal
Answer & Solution
Correct answer: B. q ≠ 0
Division by zero is undefined, so q must be non-zero. The numerator p can be any integer (including 0 — since 0/5 = 0 is rational).
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