Search found 22 matches

by Rajani

Thu Sep 03, 2009 5:49 am
Forum: Problem Solving
Topic: coordinate geometry/probability
Replies: 2
Views: 1031

coordinate geometry/probability

1. In a xy plane at what 2 points dpes the line y = (x+a)(x+b) intersec the x-axis. a. a+b=-1 b. the graph intersects the y axis at (0,-6) 2. A decorater has to choose 2 chairs and 2 tables from a warehouse such that all are diffrent. if there are 5 diffrent chairs and 150 combinations possible, how...

by Rajani

Thu Sep 03, 2009 3:53 am
Forum: Problem Solving
Topic: coordinate geometry/probability
Replies: 2
Views: 1031

or is it this way !!

from b . y=0 so even x could be x=0 . in tht case x-y =0 is not greater than 0.

hence the OA is A.

Hussh!! self solve ..

by Rajani

Thu Aug 27, 2009 5:45 am
Forum: Data Sufficiency
Topic: modulus
Replies: 6
Views: 1215

I did it this way -

xy+z=z
xy = 0
i.e x=0 or y = 0

so a. x!0 then y = 0, so |x-y| will be greater than 0
frm b. y=0 so x!0, so |x-y| again > 0.

so D but ans is A .. ?? :shock:

by Rajani

Thu Aug 27, 2009 5:24 am
Forum: Data Sufficiency
Topic: modulus
Replies: 6
Views: 1215

modulus

if xy+z=z, is |x-y|>0?

a. x!=0
b. y=0

by Rajani

Thu Aug 27, 2009 5:09 am
Forum: Data Sufficiency
Topic: modulus
Replies: 6
Views: 1215

int

if a, b and c are integers, whats the value of a?

a. (a-7)(b-7)(c-7)=0
b. bc = 18

by Rajani

Mon Aug 24, 2009 2:32 am
Forum: Data Sufficiency
Topic: int
Replies: 2
Views: 991

Slope

Circle C and line k lie in the xy plane. If centre of C lie on origin and has radius 1, does line k intersect circle C ?

a. the x intercept of line k is greater than 1.
b. the slope of the line is -1/10.

by Rajani

Mon Aug 24, 2009 2:13 am
Forum: Data Sufficiency
Topic: Slope
Replies: 3
Views: 1229

Just as.. so / Just like ... so

1. Just as William Shakespeare was the preeminent poet of England, so Robert Frost was the preeminent poet of the United States (A) Just like William Shakespeare was the preeminent poet of England, so Robert Frost (B) Just as William Shakespeare was the preeminent poet of England, so Robert Frost (C...

by Rajani

Tue Aug 11, 2009 10:16 pm
Forum: Sentence Correction
Topic: Just as.. so / Just like ... so
Replies: 3
Views: 8715

lemonade

A lemonade stand sold only small and large cups of lemonade on Tuesday. 3/5 of the cups sold were small and the rest were large. If the large cups were sold for 7/6 as much as the small cups, what fraction of Tuesday's total revenue was from the sale of large cups? 7/16 7/15 10/21 17/35 1/2

by Rajani

Sun Aug 09, 2009 10:54 pm
Forum: Problem Solving
Topic: lemonade
Replies: 2
Views: 1339

Modulus

What is the distance between a and b on the number line?

(1) |a| – |b| = 6
(2) ab > 0

by Rajani

Sun Aug 09, 2009 10:13 pm
Forum: Data Sufficiency
Topic: Modulus
Replies: 2
Views: 873

12 teams 2 teams per match -

12C2- 66 (formula nc2)

by Rajani

Mon Aug 03, 2009 4:26 am
Forum: Problem Solving
Topic: 12 teams!
Replies: 5
Views: 13278

A AA - 2
B AB - 2
C AC BC - 3 (ALPHABETIC OREDR TO BE MAINTAINED)
D AD BD CD - 4
E - 1

2+ 2 +3+ 4 + 1 = 12 and alphabets used 5

by Rajani

Wed Jul 29, 2009 5:42 am
Forum: Problem Solving
Topic: Medical experiment
Replies: 6
Views: 6234

there is a prob in ur vase 2: u havent selected any of the -4 marbles

still the ans must b E as we can it can be 13 marbles too

5x(7)-3(5)-4(1) = 16 and picks 7+5+1=13

by Rajani

Mon Jul 27, 2009 9:54 pm
Forum: Data Sufficiency
Topic: DS-game
Replies: 5
Views: 1450

stsmt one - it can be fractions .. say -1/2 and -1/4. still not sufficient
stmt 2 - chose m = -3 and n = -2 m-n = -1 > n (-2) m/n 3/2 >1
next chose m = -2 and n = -3; m-n = 1 (> n) and 2/3 < 1

togetehr they make no sense so ans = E

by Rajani

Mon Jul 27, 2009 9:42 pm
Forum: Data Sufficiency
Topic: Inequalities
Replies: 10
Views: 1370

Predictions cant go with "will" as in A, its better to use "would" than will as in D

by Rajani

Mon Jul 27, 2009 8:55 pm
Forum: Sentence Correction
Topic: February
Replies: 3
Views: 1056