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Originally posted by asthagupta on 17 Jun 2018, 02:59.
Last edited by asthagupta on 17 Jun 2018, 03:23, edited 1 time in total.
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Difficulty:
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Question Stats:
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correct 80%
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If all variable are integers, is x+y–z+tx+y–z+t even?
(1) x+y+tx+y+t is even (2) t∗zt∗z is odd
I am not sure what is the exact answer as i have a different answer and the source where i read this have a different answer. Will update official answer after discussion on the forum.
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If all variable are integers, is x+y–z+tx+y–z+t even?
(1) x+y+tx+y+t is even (2) t∗zt∗z is odd
I am not sure what is the exact answer as i have a different answer and the source where i read this have a different answer. Will update official answer after discussion on the forum.
Show more
\(x+y-z+ tx+y-z+t=x+tx+t+2y-2z\).. 2y-2z will be even, so Is x+tx+t even? If only one is odd and other even.. Odd+even*odd+even=odd Both odd.. O+O*O+O=O Both even.. E+E*E+E=E
So we are looking if both x and t are even...
1)x+y+tx+y+t is even.. x+tx+t+2y is even, so x+tx+t is even.. Ans YES Sufficient 2)t*z*t*z is odd.. This means ans is NO So sufficient
D However both statements are giving different answers
This Question is Locked Due to Poor Quality
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The question you've reached has been archived due to not meeting our community quality standards. No more replies are possible here.
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