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24 Jul 2014, 05:36
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
83% (00:51) correct
17%
(00:52)
wrong
based on 114
sessions
History
Date
Time
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Not Attempted Yet
If a and b are integers, what is the value of b ?
(1) ab = 32
(2) a^4 = b
(1) ab = 32
(2) a^4 = b
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
Data Sufficiency Forum
24 Jul 2014, 05:40
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If a and b are integers, what is the value of b ?
(1) ab = 32. This one is clearly insufficient: consider a=1 and b=32 or vise-versa.
(2) a^4 = b. Also clearly insufficient.
(1)+(2) Substitute the value of b from (2) into (1) a*a^4 = 32 --> a^5 = 32 --> a = 2 --> b = 32/a = 16. Sufficient.
Answer: C.
(1) ab = 32. This one is clearly insufficient: consider a=1 and b=32 or vise-versa.
(2) a^4 = b. Also clearly insufficient.
(1)+(2) Substitute the value of b from (2) into (1) a*a^4 = 32 --> a^5 = 32 --> a = 2 --> b = 32/a = 16. Sufficient.
Answer: C.
26 Oct 2019, 22:33
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