Search found 20 matches
Hi GMATGuruNY, Thankyou so much for the detailed explanation. I got the answer till 1/7 parts. Still I dont get the last step, Thus, 1/7 of every 15 liters must come from the pure water: (1/7) * 15 = 2.14. Here the question is How many parts of the solution should be removed and replaced with water ...
- by riz_gmat
Sun Jan 19, 2014 11:53 pm- Forum: Problem Solving
- Topic: Mixtures
- Replies: 5
- Views: 2129
Mixtures
A solution contains 8 parts water for every 7 parts of lemonade syrup. How many parts of the solution should be removed and replaced with water so that the solution will now contain 40% lemonade syrup?
(A)1.5
(B)1.75
(C)2.14
(D)2.34
(E)2.64
OA is C
- by riz_gmat
Sat Jan 18, 2014 4:25 am- Forum: Problem Solving
- Topic: Mixtures
- Replies: 5
- Views: 2129
If we join diagonal BD of parallelogram ABCD , we get another triangle ABD, such that Area of || gram ABCD = 2 Area of tri (ABD) ( since both have same base and lie bet same parallel lines) ---- 1 Area of || gram ABCD = 3 Area of tri (ABE) (Given in the question)---- 2 From 1 & 2, 2 Area of tri ...
- by riz_gmat
Sat Nov 23, 2013 12:11 pm- Forum: Problem Solving
- Topic: Which is the height of the parallelogram and the triangle?
- Replies: 2
- Views: 1065
Hi Sri, Diff between Square and Rhombus is , for Square , diagonals are equal while for Rhombus - Diagonals are unequal! Coming to question... To find : Length of diagonal JL Option 1 : JK = 2 ( ie, all sides = 2) It can be a square or Rhombus . Not sufficient ! Option 2 : KM = 2 ( One diagonal = 2)...
- by riz_gmat
Sat Nov 23, 2013 11:50 am- Forum: Problem Solving
- Topic: Length of diagonal
- Replies: 2
- Views: 1136
Hi GMATGuruNY But Question here is what is the probability this employee has an advanced degree or is female? ie, Probability of that employee having advanced degree or Probability of that employee being female. Nowhere in the question, it is mentioned employee having advanced degree cannot be femal...
- by riz_gmat
Thu Nov 21, 2013 8:37 pm- Forum: Problem Solving
- Topic: Another probability question..making mistakes!
- Replies: 6
- Views: 3099
Yes, 101 is the only possible no satisfying the conditions.
Total numbers = 199 - 100 + 1 (since bothr inclusive) = 100
[spoiler]P = 1 / 100[/spoiler]
- by riz_gmat
Thu Nov 21, 2013 5:12 am- Forum: Problem Solving
- Topic: 3 digit integer between 100 and 199, inclusive
- Replies: 8
- Views: 1883
(b-3) ( 4 + 2/b) = 0
(b-3) ( 4b + 2 ) = 0 * b = 0
Either b = 3 or b = -2/4 = -1/2
b cannot be 3 ( given in ques) , so[spoiler] b = -1/2[/spoiler]
- by riz_gmat
Mon Nov 18, 2013 8:57 pm- Forum: Problem Solving
- Topic: Struggling almost every math question i come across
- Replies: 7
- Views: 1731
Inequalities
What is the value of x?
1) |x^2 + 1| <= 1
2) |x^2 - 1| <= 1
[spoiler]OA: A[/spoiler]
Did not understand how they got this OA.
- by riz_gmat
Mon Oct 28, 2013 5:10 am- Forum: Data Sufficiency
- Topic: Inequalities
- Replies: 6
- Views: 2094
As we know , x^2 - y^2 = (x + y) (x - y) from 1) we know (x - y) = 30(K) (some factor of 30) but we dont know abt (x + y) , if (x + y) is zero , then x^2 -y^2 = 0, here question is Is the last digit of integer x^2 - y^2 a zero. hence Statement 1 alone insufficient, similarly statement 2 alone too in...
- by riz_gmat
Fri Oct 25, 2013 10:47 pm- Forum: Data Sufficiency
- Topic: last digit of integer x^2 - y^2 a zero
- Replies: 2
- Views: 1153
Hi Brent, I have a question here, u wrote, Factor to get: x = y(k - 1) + 4 As we can see, x is 4 greater than some multiple of y. So, if we divide x by y, the remainder must be 4 Since we can answer the target question with certainty, statement 2 is SUFFICIENT which i too agree, my doubt is in optio...
- by riz_gmat
Fri Oct 25, 2013 10:03 am- Forum: Data Sufficiency
- Topic: Remainder-Dint quite get the statements
- Replies: 7
- Views: 2366
Hi Friends, kindly help me on this initial speed of Red car -- S(R1) initial speed of Yellow car -- S(Y1) = 1.5 S(R1) Latter Speed of Red car = S(R2) = 1.5 S(Y1) = 2.25 S(R1) Hence, S(R1) / S(R2) = 1 / 2.25 Since Speed directly proportinal to distance, can I equate S (R1) / S (R2) = D 1 / D2 , where...
- by riz_gmat
Mon Oct 21, 2013 4:51 am- Forum: Problem Solving
- Topic: Yellow VS red CAr!
- Replies: 6
- Views: 4957
Hi Rich, Can you please help me understand how we can tell that the side of the square is 6 with the diameter of the base being 6√2? Thanks. Hi shinys, If you draw a square inside a circle, the diagonal of the square will be same as the diameter of the circle, here diameter = 6√2 , for a square...
- by riz_gmat
Sat Oct 19, 2013 9:58 am- Forum: Problem Solving
- Topic: Cylinder
- Replies: 4
- Views: 2135
If 2 items are sold each at same price ( ie, Same S.P)
one item at a gain of P %
other at a loss of P% ,
Then overall loss = p ^2 / 100 %
hence, here P = 10,
Therefore, overall loss % = 100/100 = 1%
- by riz_gmat
Sat Oct 19, 2013 3:10 am- Forum: Problem Solving
- Topic: Word Problem- Profit/Loss
- Replies: 2
- Views: 6796
Let his C.P = 100
C.P (false ) = 90 ( cheats by 10%)
S.P (false ) = 110 ( cheats by 10% on CP , professes to sell his articles at cost price )
P% = (SP - CP / CP ) * 100 = (20 / 90 )* 100 = [spoiler]22.23 %[/spoiler]
- by riz_gmat
Sat Oct 19, 2013 2:59 am- Forum: Problem Solving
- Topic: Word Problem - Profit/Loss
- Replies: 1
- Views: 3735
S.I (1) = P1 N1 R1 / 100 = 1200 * 1 * R1 / 100
S.I (2) = P2 N2 R2 / 100 = 1800 * 2/3 * 2R1 / 100
4216 = S.I (1) + S.I (2) = 12 R1 + 24 R1 = 36 R1
Hence [spoiler]R1 = 12 %[/spoiler]
- by riz_gmat
Sat Oct 19, 2013 2:42 am- Forum: Problem Solving
- Topic: Word Problem
- Replies: 1
- Views: 967