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vivek.kapoor83: Legendary Member; Posts: 833; Joined: Mon Aug 04, 2008 1:56 am; Thanked: 13 times

Integer

by vivek.kapoor83 » Tue Jan 06, 2009 6:58 am

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Source: Beat The GMAT — Data Sufficiency | Tue Jan 06, 2009 6:58 am

rajataga: Senior | Next Rank: 100 Posts; Posts: 87; Joined: Tue Dec 23, 2008 11:06 pm; Thanked: 2 times

by rajataga » Tue Jan 06, 2009 7:35 am

E.

This has been discusses earlier a couple of times.

In brief, if the digit after the decimal is 0-4, then round it off to the lower integer. If it is 5-9, round it off to the higher interger.

Now try this by pluggin in values for x.4, x.5, x.6, you will get different values. Hence, insufficient.

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vivek.kapoor83: Legendary Member; Posts: 833; Joined: Mon Aug 04, 2008 1:56 am; Thanked: 13 times

by vivek.kapoor83 » Tue Jan 06, 2009 8:59 am

i did it same way

stmt 1 : value of 3.6 <x+y <4.4
stmt 2 : value of 0.6 <x-y <1.4

adding two 4.2 <2x<5.8
2.1 <x<2.9 ( I divided wrongly here, i put the value 5.8/2 =2.3
Hence Insuff.
is this the sol.

MERA KYA HOGA KALIA

IS this d correct sol ?

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ronniecoleman: Legendary Member; Posts: 546; Joined: Sun Nov 16, 2008 11:00 pm; Location: New Delhi , India; Thanked: 13 times

by ronniecoleman » Wed Jan 07, 2009 1:20 am

vivek.kapoor83 wrote:i did it same way

stmt 1 : value of 3.6 <x+y <4.4
stmt 2 : value of 0.6 <x-y <1.4

adding two 4.2 <2x<5.8
2.1 <x<2.9 ( I divided wrongly here, i put the value 5.8/2 =2.3
Hence Insuff.
is this the sol.

MERA KYA HOGA KALIA

IS this d correct sol ?

HIMMAT NA HAAR BACHE!!

Admission champion, Hauz khaz
011-27565856

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logitech: Legendary Member; Posts: 2134; Joined: Mon Oct 20, 2008 11:26 pm; Thanked: 237 times; Followed by:25 members; GMAT Score:730