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billyr: Senior | Next Rank: 100 Posts; Posts: 41; Joined: Tue Dec 16, 2008 11:53 pm

by billyr » Thu Feb 26, 2009 6:15 am

How to approach the statement above?

Thanks

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Source: Beat The GMAT — Data Sufficiency | Thu Feb 26, 2009 6:15 am

DanaJ: Site Admin; Posts: 2567; Joined: Thu Jan 01, 2009 10:05 amFollowed by: 550 members; Thanked: 712 times; GMAT Score:770

by DanaJ » Thu Feb 26, 2009 6:47 am

1 is insufficient. Think of 145 or 235 or 415 or 136....
2 is insufficient. You have many options: 789, 234, 567,....

Take the two and it's still insufficient: 235 and 145 are examples, since they both comply to the outlined rules.

So my guess is
E

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hk: MBA Student; Posts: 532; Joined: Wed Jan 28, 2009 1:39 pmFollowed by: 9 members; Location: Barcelona; Thanked: 33 times; GMAT Score:640

by hk » Thu Feb 26, 2009 1:49 pm

I would approach this, by giving values to x,y,z. If i can form 2 different three digit numbers using the statements then one could safely assume that its insufficient...

(i) Insufficient - Too many options like 127, 901, 361 etc
(ii) Insufficient - Too many options like 123, 234, 345, 456, 159 etc

Both together - Insufficient - Too many options like 136, 235 etc

So answer is E

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