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Let x and y be positive integers, and r and s be single-digit positive integers. If x/y = r.sss, where the bar below the s indicates that the decimal repeats infinitely, which of the following CANNOT be true?
(A) y = 1.2 × 10^a, where a is a positive integer.
(B) y = 1.5 × 10^b, where b is a positive integer.
(C) y = 1.8 × 10^c, where c is a positive integer.
(D) y = 2.5 × 10^d, where d is a positive integer.
(E) y = 2.7 × 10^e, where e is a positive integer.
OA D
Source: Manhattan Prep
(A) y = 1.2 × 10^a, where a is a positive integer.
(B) y = 1.5 × 10^b, where b is a positive integer.
(C) y = 1.8 × 10^c, where c is a positive integer.
(D) y = 2.5 × 10^d, where d is a positive integer.
(E) y = 2.7 × 10^e, where e is a positive integer.
OA D
Source: Manhattan Prep
