DS princeton review drill 11

ifthyder · Posted: Sat Aug 16, 2008 4:07 am Post subject: DS princeton review drill 11

--------------------------------------------------------------------------------

ds yes no answer question from princeton review ds drill 11

--------------------------------------------------------------------------------

If x is a positive number, is x < 1?

(1) 2x < 1
(2) 2x £ 2

its answer is A

its gives yes when we plug values less than 1/2 but what if we plug values like 4/5 which is .8 or 3/5 which is .6 it gives no answer so princeton review called statement 1 sufficient despite of the fact it gives sometime positive and sometime negative value.
somebody put more light on it how is that possible ?

Suyog · Posted: Sat Aug 16, 2008 6:06 am Post subject:

I'm not sure what u r asking, but I'll try...

if x = 4/5 = 0.8 then as per (I) 2x = 2(0.8 ) = 1.6 or
if x = 3/5 = 0.6 then as per (I) 2x = 2(0.6) = 1.2

since 2x should be less than 1 to hold true, ur test cases are wrong.

Only when x < 1/2 then 2x will be less than 1 and since, x is positive number, it will suffice.

I'm not sure what is £ in option (II)

Let me know. Thanks!

sudhir3127 · Posted: Sat Aug 16, 2008 10:55 am Post subject:

Please refrain from posting the same question twice on the same thread ..

please carry on ur discussion on the following link...

http://www.beatthegmat.com/ds-princeton-review-drill-11-t16351.html