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If X and Y are both integers different from zero, what is the value of

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Bunuel
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If X and Y are both integers different from zero, what is the value of [#permalink] New post   20 Jul 2016, 11:42
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If X and Y are both integers different from zero, what is the value of (X + 2Y)?

(1) X^4 = Y^4.
(2) X = 5.
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E
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kplusprinja1988
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Re: If X and Y are both integers different from zero, what is the value of [#permalink] New post   20 Jul 2016, 11:46
Answer should be E.

From the first statement we can see that x=1 and Y=-1 or it could be vice versa.It could be any other integer .So we cannot get any proper answer

From second statement we get that X=5 but no value of Y.

Combined.X=5 and Y could be 5 or -5.So not conclusive.

Hence answer is E.

Correct me if i am wrong
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Re: If X and Y are both integers different from zero, what is the value of [#permalink] New post   20 Jul 2016, 21:35
STEM: X+2Y=?

STATEMENT-1:In DS only positive root is accepted. So X=Y but no way to know the value.....insufficient

STATEMENT-2: we don't know about Y.....insufficient

COMBINING 1 & 2: X=5, Y=5.....sufficient

ANS: C
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Re: If X and Y are both integers different from zero, what is the value of [#permalink] New post   20 Jul 2016, 21:57
C is the right answer.
given x & y integer but not equal to Zero

it means x & y can be -ve or positive integer but no zero.

1- given that x4 =y4 it means x=y . but we don`t know whether these are negative or positive & whats the numeric value? hence no suff.

2-says that x=5 it means x +ve integer & but no info about y hence not suff.

putting together we know that x=y as per first & x=5 given in second . now we can say c is sufficinet,
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Re: If X and Y are both integers different from zero, what is the value of [#permalink] New post   20 Jul 2016, 22:13
Bunuel wrote:
If X and Y are both integers different from zero, what is the value of (X + 2Y)?

(1) X^4 = Y^4.
(2) X = 5.

combining both the statements is not sufficient to answer as X can be negative or positive. same is with Y
So E.
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Re: If X and Y are both integers different from zero, what is the value of [#permalink] New post   24 Jul 2016, 03:05
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shravan2025 wrote:
C is the right answer.
given x & y integer but not equal to Zero

it means x & y can be -ve or positive integer but no zero.

1- given that x4 =y4 it means x=y . but we don`t know whether these are negative or positive & whats the numeric value? hence no suff.

2-says that x=5 it means x +ve integer & but no info about y hence not suff.

putting together we know that x=y as per first & x=5 given in second . now we can say c is sufficinet,


bro,

if x^4=y^4 => either x=y or x=-y.

Hence, answer should be E as we don't know if x=y=5 or x=5 and y=-5.
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Re: If X and Y are both integers different from zero, what is the value of [#permalink] New post   30 Jul 2016, 09:13
Yes Abhimahna..
i missed that aspect..thx
it should be E
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Re: If X and Y are both integers different from zero, what is the value of [#permalink]
30 Jul 2016, 09:13
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Bunuel
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