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I may have missed something, but where does it say that p and q are integers. What if q is 1/5 and t is 1/25, assuming p^2 as 5^2, So in this case the answer would be that we do not know if q is greater than or less than t. In that case statement 1 is not sufficient. How does it matter whether p an...

by ajith

Mon Sep 22, 2014 11:25 am
Forum: Data Sufficiency
Topic: Cutie
Replies: 9
Views: 2528

"A company employs 7 men and 8 women. How many different three-person committees could be formed which do not consist entirely of men or entirely of women?" Just curious.....the solution to above problem should be - 15C3 - 7C3 - 8C3 Can someone please confirm? Answer to that problem is 15C3 - 7C3 -...

by ajith

Thu Aug 25, 2011 10:12 am
Forum: Problem Solving
Topic: how many unique triangles?
Replies: 11
Views: 5403

Fractal wrote:do you have to know the formula for a right circular cone?

thx
If you want the volume the formula is 1/3. Pi. r^2. h

SA = pi. r^2 + pi.r.l

r = radius, h = height , l = length

by ajith

Mon Aug 08, 2011 1:10 pm
Forum: Problem Solving
Topic: right circular cone
Replies: 2
Views: 1099

Can someone please explain the above. What ratio is he talking about? Consider 2 cases, Gross income was 100 and Net Deductions were 10 (Gross income to Deduction ratio =10) Gross income was 200 and deductions were 10 ((Gross income to Deduction ratio = 20) The net income increase in both cases are...

by ajith

Mon Aug 08, 2011 1:05 pm
Forum: Data Sufficiency
Topic: Guy's net income
Replies: 10
Views: 5126

Please help on this one The sum of the first 50 positive even integers is 2550. what is the sum of the even integers from 102 to 200 inclusive? A. 5100 B. 7550 C. 10100 D. 15500 E. 20100 total terms=(200-102+1)/2=50 sum=50/2[102+200]=7550 when i divide (200-102 + 1) /2 i get 49.5! It should have be...

by ajith

Mon May 30, 2011 12:59 pm
Forum: Problem Solving
Topic: The sum of the first 50 positive even integers is 2550. what
Replies: 9
Views: 15961

There is a platter with 5 bowls on the platter. 1 bowl is blue and the other 4 bowls are white. The are 5 available snacks, raisins, peanuts, and 3 other snacks. Raisins or peanuts can only go in the blue bowl, and the other snacks must go in the white bowls (of course, if raisins are in the blue b...

by ajith

Sat Feb 05, 2011 8:32 am
Forum: Problem Solving
Topic: a ps from gmat club
Replies: 2
Views: 698

Two women start walking toward each other from two ends of a bridge at the same time. They both leave at dawn. When they meet, it is 12pm. When the first woman reaches the other end of the bridge, it is 4pm. When the second woman reaches the other end of the bridge, it is 9pm. They both walk at con...

by ajith

Sat Feb 05, 2011 8:21 am
Forum: GMAT Math
Topic: Tough question, need help!
Replies: 3
Views: 1537

S2 - 500 units cost 45K less than 1000, therfefore can I assume 500 units cost 45K to manufacture? Based on this 45000 = 500K + T.. That is where it goes wrong the equation 45000 = 500K + T is wrong Instead it should have been 45000 = 500K manufacturer M's cost of producing 500 units in a month is ...

by ajith

Sat May 15, 2010 5:32 am
Forum: Data Sufficiency
Topic: collection of tough problems from G PREP - 24
Replies: 9
Views: 3638

Plz check the link below http://www.beatthegmat.com/percentile-t31897.html#139703 HTH! I totally disagree with the explanation in that link even though I agree with the answer Angela is at 90th percentile means there are 72 students (90/100*80) below Angela! or there are 7 above Angela In the other...

by ajith

Fri May 14, 2010 8:08 pm
Forum: Problem Solving
Topic: How to calculate the Percentile
Replies: 9
Views: 3434

ashforgmat wrote:Now i am confused as to which is the correct explanation....
May I know the source of the question.

if you are at 90th percentile on some parameter means 90% of the group is below you on that parameter.
So in a class of 80 if you are at 90th percentile - 90% i.e. 72 students are below you.

by ajith

Fri May 14, 2010 3:50 am
Forum: Problem Solving
Topic: How to calculate the Percentile
Replies: 9
Views: 3434

how many points of intersection does Y = (X-1) (X +1) (X-3) have with x axis? Equation of x axis is y=0 so to find the points of intersection, we have to solve y= (X-1) (X +1) (X-3) =0 => (X-1) (X +1) (X-3) =0 x=1, x= -1 and x=3 are the solutions so there are 3 such points where the curve intersect...

by ajith

Thu May 13, 2010 11:46 pm
Forum: Problem Solving
Topic: 189) how mnay points of intersection
Replies: 1
Views: 514

154) Angela’s grade was in the 90th percentile out of 80 grades in her class. In another class there were 19 grades higher than Angela’s. If nobody had Angela’s grade, then Angela was what percentile of the two classes combined? a. 72 b. 80 c. 81 d. 85 e. 92 please can some help with the expl...

by ajith

Thu May 13, 2010 11:43 pm
Forum: Problem Solving
Topic: How to calculate the Percentile
Replies: 9
Views: 3434

sanju09 wrote:Suppose 7 monkeys take 7 minutes to eat 7 bananas. How many monkeys would it take to eat 70 bananas in 70 minutes?
(A) 70
(B) 49
(C) 35
(D) 7
(E) 1
it takes 7 monkey minutes to eat 1 bananas

to eat 70 bananas it takes 490 monkey minutes

if it has to finish in 70 minutes we need 490/70 = 7 monkeys

by ajith

Thu May 13, 2010 4:23 am
Forum: Problem Solving
Topic: eat 70 bananas
Replies: 1
Views: 695

ps63739 wrote:1,
I differ!

referring to examples in the page - http://en.wikipedia.org/wiki/Remainder

"When dividing 26 by 4, 6 is the quotient and 2 is the remainder, because 26=6×4+2."

26/4 = 13/2 ; so by your logic remainder should have been 1 but, instead it is 2.

by ajith

Thu May 06, 2010 7:49 am
Forum: Problem Solving
Topic: (x – 2)! is divided by x
Replies: 10
Views: 1860