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03 Oct 2023, 05:15
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
85%
(hard)
Question Stats:
42% (01:59) correct
58%
(02:10)
wrong
based on 109
sessions
History
Date
Time
Result
Not Attempted Yet
If a + b is even, is b an integer?
(1) a - b = integer
(2) a + 3b = even
(1) a - b = integer
(2) a + 3b = even
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
04 Oct 2023, 22:30
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1)
a+b=even
a-b=int
2a=even+int
2a can be odd or even. If it is even, a is an integer and so b must be int. 2a is odd, then b may or not be an integer. INS.
2)
a+3b=even
a+b=even
2b=even
b=even
If b is even, b must be int. Sufficent
B
Posted from my mobile device
a+b=even
a-b=int
2a=even+int
2a can be odd or even. If it is even, a is an integer and so b must be int. 2a is odd, then b may or not be an integer. INS.
2)
a+3b=even
a+b=even
2b=even
b=even
If b is even, b must be int. Sufficent
B
Posted from my mobile device
26 Sep 2024, 10:31
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mysterymanrog
Why cant B be an even decimal number? What am I missing here? Please explain
