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by shashank.ism » Tue Feb 09, 2010 12:27 pm
Is y an integer?

(1) y3 is an integer
(2) 3y is an integer

Ans C
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Source: — Data Sufficiency |
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by harsh.champ » Tue Feb 09, 2010 12:33 pm
shashank.ism wrote:Is y an integer?

(1) y3 is an integer
(2) 3y is an integer

Ans C
Statement 1 :-Insufficient since cube root of all integers are not integers.
Statement 2:-Insufficient since 1 = 3 x 1/3 is an integer.

Considering both,we get the ans.
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by Osirus@VeritasPrep » Tue Feb 09, 2010 12:33 pm
(1) is insufficient because y could be a cube root

(2) is insufficient because y could be 1/3

combined we know that y is not a cube root and that y is not a fraction. Choose C
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by ajith » Tue Feb 09, 2010 12:35 pm
shashank.ism wrote:Is y an integer?

(1) y3 is an integer
(2) 3y is an integer

Ans C
y3? is it y^3?
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by harsh.champ » Tue Feb 09, 2010 12:50 pm
ajith wrote:
shashank.ism wrote:Is y an integer?

(1) y3 is an integer
(2) 3y is an integer

Ans C
y3? is it y^3?
Yes, it is y^3.It was a typo error .

For confirmation,you can see the soln.s posted above. :)
HTH
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by Osirus@VeritasPrep » Tue Feb 09, 2010 12:51 pm
harsh.champ wrote:
ajith wrote:
shashank.ism wrote:Is y an integer?

(1) y3 is an integer
(2) 3y is an integer

Ans C
y3? is it y^3?
Yes, it is y^3.It was a typo error .

For confirmation,you can see the soln.s posted above. :)
HTH
LOL...you posted as if you had started the thread yourself..lol :wink:
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