Search found 55 matches


Laura, thanks for the figures. However, doesn't Intersect mean to cut across? I got the 2,4 and 6 part but can't figure out how a triangle can intersect a circle at 1, 3 or 5 points. It seems that in your diagrams the triangle is just touching the circle and not intersecting it. Please explain. Some...

by haidgmat

Fri Nov 26, 2010 6:37 am
Forum: GMAT Math
Topic: PS: Circle intersects triangle
Replies: 4
Views: 1672

that was so easy! can't believe I didn't think of it!!

Thanks!

beat_gmat_09 wrote:Use formula - (a^2 - b^2) = (a+b)*(a-b)
(1001^2 - 999^2)/(101^2 - 99^2)
= (1001+999) * (1001-999) / (101+99)*(101-99)
= (2000 * 2) / (200 *2)
= 10

by haidgmat

Fri Nov 26, 2010 6:33 am
Forum: GMAT Math
Topic: PS: Squares
Replies: 2
Views: 1372

hello Laura, Thanks for your reply. I needed an explanation for this. I thought it was E. I found c could be both even or odd combining both 1 & 2. Can you help? Do you need an explanation, or are you just sharing the problem? :) If you'd like help with the question, please let us know what abou...

by haidgmat

Fri Nov 26, 2010 6:28 am
Forum: GMAT Math
Topic: DS: even/odd
Replies: 4
Views: 2005

DS: even/odd

If c and d are integers, is c even?

1. c(d+1) is even
2. (c+2)(d+4) is even

[spoiler]OA: C[/spoiler]

by haidgmat

Thu Nov 25, 2010 3:44 pm
Forum: GMAT Math
Topic: DS: even/odd
Replies: 4
Views: 2005

PS: Squares

(1001^2 – 999^2)/(101^2 – 99^2)

1. 10
2. 20
3. 40
4. 80
5. 100

[spoiler]OA: 1[/spoiler]

by haidgmat

Thu Nov 25, 2010 3:42 pm
Forum: GMAT Math
Topic: PS: Squares
Replies: 2
Views: 1372

DS: Selling Books

Store S sold a total of 90 copies of a certain book during the seven days of last week and it sold different number of copies on any two of the days. If for the seven days Store S sold the greatest number of copies on Saturday and the second greatest number of copies on Friday, did Store S sell more...

by haidgmat

Thu Nov 25, 2010 3:40 pm
Forum: GMAT Math
Topic: DS: Selling Books
Replies: 1
Views: 1411

PS: Circle intersects triangle

Which of the following lists the number of points at which a circle can intersect a triangle?

1. 2 and 6 only
2. 2, 4 and 6 only
3. 1, 2, 3, and 6 only
4. 1,2,3,4 and 6 only
5. 1,2,3,4,5, and 6

[spoiler]OA:E[/spoiler]

by haidgmat

Thu Nov 25, 2010 3:39 pm
Forum: GMAT Math
Topic: PS: Circle intersects triangle
Replies: 4
Views: 1672

PS: tricky sq rt

If x<0, then sq.rt.(-x|x|) is
1. –x
2. -1
3. 1
4. X
5. Sq.rt(x)

[spoiler]OA:A[/spoiler]

by haidgmat

Thu Nov 25, 2010 3:38 pm
Forum: GMAT Math
Topic: PS: tricky sq rt
Replies: 5
Views: 1773

gotcha. I got part B but wasn't sure why A is also suff. Thanks bud! But 3 isnt divisible by 6! Isn't remainder the number which is left behind after a number is divided by another number? Yes 3 is not divisible by 6. But, when 3 is divided by 6 the remainder is 3 and quotient is 0 (zero). And thats...

by haidgmat

Mon Nov 22, 2010 6:17 am
Forum: GMAT Math
Topic: DS: Remainder
Replies: 4
Views: 1521

Thanks Mitch! couldn't have explained it better! http://s1.postimage.org/nye4vr5w/Untitled.jpg In the figure shown, what is the value of X? 1. QR=RS 2. ST=TU[/img] I was asked by PM to comment. Neither statement alone is sufficient to determine the value of x. When we combine the two statements, her...

by haidgmat

Mon Nov 22, 2010 6:16 am
Forum: GMAT Math
Topic: DS: Geometry/triangles
Replies: 3
Views: 2958

But 3 isnt divisible by 6! Isn't remainder the number which is left behind after a number is divided by another number? What is the remainder when the positive integer x is divided by 6? 1. When x is divided by 2, the remainder is 1; and when x is divided by 3, the remainder is 0 2. When x is divide...

by haidgmat

Mon Nov 22, 2010 1:04 am
Forum: GMAT Math
Topic: DS: Remainder
Replies: 4
Views: 1521

CR: Tranquilizer inhibits fertility

Can someone explain this to me? In a certain wildlife park, park rangers are able to track the movements of many rhinoceroses because those animals wear radio collars. When, as often happens, a collar snips off, it is put back on. Putting a collar on a rhinoceros involves immobilizing the animal by ...

by haidgmat

Sun Nov 21, 2010 11:38 am
Forum: GMAT Verbal & Essays
Topic: CR: Tranquilizer inhibits fertility
Replies: 2
Views: 2488

DS: Integers/odd/even

If x is an integer, is (x^2 + 1)(x + 5) an even number?

1. X is an odd number

2. Each prime factor of x^2 is greater than 7

OA: D

I get part 1 but why 2?

by haidgmat

Sun Nov 21, 2010 11:31 am
Forum: GMAT Math
Topic: DS: Integers/odd/even
Replies: 2
Views: 1566

DS: Fractions

A manufacturer conducted a survey to determine how many people buy products P and Q. What fraction of the people surveyed said that they buy neither product P nor product Q? 1. one third of the people surveyed said that they buy product P but not product Q 2. one half of the people surveyed said tha...

by haidgmat

Sun Nov 21, 2010 11:28 am
Forum: GMAT Math
Topic: DS: Fractions
Replies: 1
Views: 1472

DS: Coordinates

In the xy-plane, at what two points does the graph of y=(x+a)(x+b) intersect the x-axis?

1. a + b= -1
2. The graph intersects the y-axis at (0, -6)

OA: C

by haidgmat

Sun Nov 21, 2010 11:25 am
Forum: GMAT Math
Topic: DS: Coordinates
Replies: 4
Views: 13328