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If x is a positive integer then find x? (Source:GMAT INSIGHT

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If x is a positive integer then find x? (Source:GMAT INSIGHT

by GMATinsight » Mon Oct 17, 2016 4:12 am
If x is a positive integer then find x?
(1) x^2−5x+6=0
(2) x^2=3x

(Source:www.GMATinsight.com)

Answer: option B
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by melguy » Mon Oct 17, 2016 5:18 am
1) x^2−5x+6=0
(x-3) (x-2) = 0
x = 3 or x = 2
Not Sufficient

2) x^2=3x
Divide both sides by x
x = 3
Sufficient
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by fiza gupta » Mon Oct 17, 2016 6:11 am
given x>0
1) x^2-5x+6=0
x=3 or 2
INSUFFICIENT

2) x^2=3x
x^2-3x=0
x(x-3)=0
x=0 or 3
but x>0 SO
x=3
SUFFICIENT

SO B
Fiza Gupta
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