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15 Nov 2019, 02:05
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B
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Difficulty:
75%
(hard)
Question Stats:
47% (01:45) correct
53%
(01:43)
wrong
based on 263
sessions
History
Date
Time
Result
Not Attempted Yet
If a and b are positive integers, then what is the value of \(a^b\)?
(1) \(b^a = 27\)
(2) \(a^{2b} = 729\)
Are You Up For the Challenge: 700 Level Questions
(1) \(b^a = 27\)
(2) \(a^{2b} = 729\)
Are You Up For the Challenge: 700 Level Questions
15 Nov 2019, 07:29
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If a and b are positive integers, then what is the value of \(a^b\)?
(1) \(b^a = 27\)
27=27^1....a^b=1^27=1
27=3^3......a^b=3^3=27
Insufficient
(2) \(a^{2b} = 729\)
729=3^6=3^{2*3}....a^b=3^3=27
729=27^2=27^{2*1}.....a^b=27^1=27
No other way that power is EVEN
Sufficient
B
(1) \(b^a = 27\)
27=27^1....a^b=1^27=1
27=3^3......a^b=3^3=27
Insufficient
(2) \(a^{2b} = 729\)
729=3^6=3^{2*3}....a^b=3^3=27
729=27^2=27^{2*1}.....a^b=27^1=27
No other way that power is EVEN
Sufficient
B
15 Nov 2019, 08:45
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If a and b are positive integers, then what is the value of abab?
(1) b2a=27
: b = 3 or 27, a = 3 or 1 ....so a^b is coming 27 or 1 --- NS
(2) a2b=729
: a = 3 or 27 , b = 3 or 1 ...so a^b is coming 27 only .. Sufficient
Answer is B
(1) b2a=27
: b = 3 or 27, a = 3 or 1 ....so a^b is coming 27 or 1 --- NS
(2) a2b=729
: a = 3 or 27 , b = 3 or 1 ...so a^b is coming 27 only .. Sufficient
Answer is B
