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29 Mar 2016, 03:13
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If r and q are integers, what is the value of (5^r)(3^(q+1))?
(1) (5^r)(3^q) = 729
(2) r + q = 6
(1) (5^r)(3^q) = 729
(2) r + q = 6
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Schools: ISB '18 (A) Fisher '19 (II) Smeal Penn State "19 (A$) Kelley '19 (S) Olin '19 (S) Simon '19 (A$) Broad '19 (S)
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29 Mar 2016, 04:01
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If r and q are integers, what is the value of (5^r)(3^(q+1))?
(1) (5^r)(3^q) = 729
(2) r + q = 6
we can break the eqn as (5^r)(3^q)3
St(1) gives (5^r)(3^q) = 729. So answer is 729*3. Hence sufficient.
St(2) r + q = 6 doesnt help. Hence no sufficient.
Hence the answer is A.
(1) (5^r)(3^q) = 729
(2) r + q = 6
we can break the eqn as (5^r)(3^q)3
St(1) gives (5^r)(3^q) = 729. So answer is 729*3. Hence sufficient.
St(2) r + q = 6 doesnt help. Hence no sufficient.
Hence the answer is A.
