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That's not true. Point X can be at the point of intersection and therefore be present in two planes. This has no bearing on the location of point Y. Try this experiment to demonstrate the problem at hand. Take two hair combs (the simple black kind) and on the first draw a circle. On the second pick ...
- by colinbendell
Sun Mar 11, 2007 8:00 pm- Forum: Data Sufficiency
- Topic: three space question? OG (11ed) question incorrect.
- Replies: 6
- Views: 2679
three space question? OG (11ed) question incorrect.
Source: OG (11ed) p25 #36 (Diagnostic) If X and Y are points in a plane and X lies inside the circle C with center O and radius 2, does Y lie inside circle C? 1) The length of the line segment XY is 3 2) The length of the line segment OY is 1.5 Answer: B (#2 is sufficient) My Answer: E - while X and...
- by colinbendell
Sun Jan 28, 2007 9:29 pm- Forum: Data Sufficiency
- Topic: three space question? OG (11ed) question incorrect.
- Replies: 6
- Views: 2679
Re: If x + y >0, is x > |y|? confused...
22. If x + y >0, is x > |y|? (1) x > y (2) y < 0 I solved it another way: From the question: x > -y (transposing from x+y > 0) With 1) any value of x > y must also be x > -y which is the same thing as saying x > |y| SUFFICIENT With 2) y is negative and when you plug it into the first equation you w...
- by colinbendell
Tue Jan 23, 2007 9:57 pm- Forum: Data Sufficiency
- Topic: If x + y >0, is x > |y|? confused...
- Replies: 4
- Views: 12073
Re: Error in OG Data Sufficiency Book - check my math
The factors of 6 are 1, 2, and 3. The Factors of 6 are actually 1, 2, 3 and 6 . Notice that the statement does not imply only prime factors - all factors are valid. Therefore if you take any two factors you could come up with 6 - 2 which of course is a positive and therefore does not qualify for st...
- by colinbendell
Tue Jan 23, 2007 9:43 pm- Forum: Data Sufficiency
- Topic: Error in OG Data Sufficiency Book - check my math
- Replies: 5
- Views: 4111