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09 Dec 2019, 01:44
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
55% (01:15) correct
45%
(01:07)
wrong
based on 176
sessions
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If p and q are integers, is (p^9 + pq ) an even number?
(1) p is an even integer.
(2) q is an odd integer.
Are You Up For the Challenge: 700 Level Questions
(1) p is an even integer.
(2) q is an odd integer.
Are You Up For the Challenge: 700 Level Questions
09 Dec 2019, 12:02
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Statement 1-
(p^9+pq)= p(p^8+q)
p is even
e(e+o/e)= e
Sufficient
Statement 2-
p(p^8+q)
case 1- p is even
e(e+o)=e
case 2- p is odd
o(o+o)=o*e=e
Sufficient
(p^9+pq)= p(p^8+q)
p is even
e(e+o/e)= e
Sufficient
Statement 2-
p(p^8+q)
case 1- p is even
e(e+o)=e
case 2- p is odd
o(o+o)=o*e=e
Sufficient
Bunuel
08 Apr 2020, 06:32
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Bunuel
Solution
Step 1: Analyse Question Stem
- • p and q are integers.
Step 2: Analyse Statements Independently (And eliminate options) – AD/BCE
Statement 1: p is an even number.
- • \(p^9\) is an even number [Every power of an even number is even]
• \(p*q\) is also an even number [Multiplication of any integer with even number is even]
- o \(p^9 + p*q\) = even + even = even [Addition of two even numbers is even]
Statement 2: q is an odd number.
- • Case 1: If p is an even number, then \(p^9 + p*q\) is also an even number [Same as above]
• Case 2: If p is an odd number
- o Then, \(p^9\) is also an odd number [any power of an odd number is odd]
- \(p*q\) is also an odd number [multiplication of two odd number is odd]
