Search found 19 matches
This is an assumption question 'However, since the number of high definition televisions in Zorskan was approximately the same in 2009 as in 2006, the number of Zorskans able to access the stations probably did not increase significantly. What could be the assumption here? ( C) Few if any of the hig...
- by jayoptimist
Wed Jul 11, 2012 11:12 pm- Forum: Critical Reasoning
- Topic: CR - Assumption
- Replies: 5
- Views: 1395
Thanks again.
- by jayoptimist
Sat May 19, 2012 11:13 pm- Forum: Problem Solving
- Topic: Maths Problem
- Replies: 2
- Views: 1130
Maths Problem
If "p" is a positive integer and "p^3" is divisible by 144, then the largest positive integer that must divide "p" is
(A) 2
(B) 3
(C) 4
(D) 6
(E) 12
Ans is E
Please explain the steps for arriving at the answer.
- by jayoptimist
Fri May 18, 2012 9:24 pm- Forum: Problem Solving
- Topic: Maths Problem
- Replies: 2
- Views: 1130
- by jayoptimist
Sun Jan 22, 2012 8:18 pm- Forum: Data Sufficiency
- Topic: Quadrilateral
- Replies: 25
- Views: 13627
- by jayoptimist
Thu Jan 19, 2012 10:27 pm- Forum: Data Sufficiency
- Topic: 700 DS tough question .. really challenging !
- Replies: 53
- Views: 39408
The 1st marble selected can be white or black. Say a girl selects white. Then, 1st Girl = 5/10 (probability of choosing a WHITE marble) 2nd Girl = 4/9 (Depending on which color is choosen by the first one 3rd Girl = 3/8 4th Girl = 2/7 5th Girl = 1/6 Multiplying the probabilities we get 1/252. But th...
- by jayoptimist
Thu Jan 19, 2012 8:46 pm- Forum: Problem Solving
- Topic: Probability - 10 marbles
- Replies: 143
- Views: 55336
Q. |x|= y-z? x= y-z or -(y-z)/(z-y) Stmt 1) x+y = z x = z-y but we dont know z-y is +ive or -ive Stmt 2) x<0 ; so x is -ive. but nothing is mentioned about y or z. however when we combine 1 and 2, we have z-y is -ive.hence y-z = positive x. |x| = x = y-z.Ans to the question is YES. Hence C. (Pls. co...
- by jayoptimist
Thu Jan 19, 2012 7:53 am- Forum: Data Sufficiency
- Topic: Is |x| = y - z ?
- Replies: 36
- Views: 22166
1. Given (-a,b) and (-b,a) are in the same quadrant. This means "a" and "b" have the same signs.(+,-) 1) xy > 0 Means x and y have the same signs. Good. But this does not tell us if the values are in the same quadrant as (-a,b) and (-b,a). Insufficient. So we need something that ...
- by jayoptimist
Thu Jan 19, 2012 6:32 am- Forum: Data Sufficiency
- Topic: quadrant problem
- Replies: 21
- Views: 12402
1-100 = 19, 9's (9,19,29,39,49,59,69,79,89,99 & 90,91,92,93,94,95,96,97,98)
Hence,
1-705 = 19*7=133.
- by jayoptimist
Thu Jan 19, 2012 2:27 am- Forum: Problem Solving
- Topic: pages of the book
- Replies: 28
- Views: 16126
The formula for the Area of a triangle is 1/2 BASE X ALTITUDE. Stmt 1 : If the angles ABC and KLM are equal, the triangles are similar triangles. 1/2 BC * AC = 4 * 1/2* LM * KM BC * AC = 4 LM * KM = 2 LM * 2 KM Observe that the length of sides double when the Area increases (SIMILAR TRIANGLES) Hence...
- by jayoptimist
Thu Jan 19, 2012 1:03 am- Forum: Data Sufficiency
- Topic: whats the answer of this one and why
- Replies: 37
- Views: 22675
My Bit.
1) Events are non related.
Total No of ways we do not get a 6 when a dice is rolled = 1-(1/6) = 5/6
4 Dices are rolled, hence (5/6)^4 = 625/1296 ways in which we dont get a 6.
1-625/1296 = 671/1296.
Hence 671
- by jayoptimist
Wed Jan 18, 2012 11:15 pm- Forum: Problem Solving
- Topic: 4 Dice
- Replies: 20
- Views: 15885
My Bit. B worked for 10 days. Then, A and B together completed the project. B finishes 10*(1/30)= 1/3 rd of the project. ( In 1 day B does 1/30 of the project) Rate of A+B in 1 day = 1/12 th of the project. ( A + B = 1/20 + 1/30 = 1/12) Hence no of days to complete 2/3rd of project = 2/3 * 12 = 8 da...
- by jayoptimist
Wed Jan 18, 2012 10:47 pm- Forum: Problem Solving
- Topic: A quits before the project is completed
- Replies: 40
- Views: 23860
- by jayoptimist
Wed Jan 18, 2012 8:38 pm- Forum: Data Sufficiency
- Topic: prime & divisibility
- Replies: 17
- Views: 9964
Approach is very simple.
PP (Purchase price) = 150
Let, Selling Price SP = X
Mark up on SP = 40%
So we have an equation here,
PP + Mark up on SP = SP
150+ (40/100)*X = X
Solving for X, we have X = 250
PP= 150
SP= 250
Gross Profit = 250-150 = 100.
- by jayoptimist
Wed Jan 18, 2012 3:29 am- Forum: Problem Solving
- Topic: How should my approach be to these kind of problems?
- Replies: 4
- Views: 1374
My Bit. 1. If the sum of the digits of an integer are divisible by 3, then the number is divisible by 3. ( This helps us resolve the problem of interchange of digits of 100's place and 10's place) 2. How many multiples of 3 are there between 310 and 400 ? 3*104 = 312 3*133 = 399 133-104+1 = 30.( Hop...
- by jayoptimist
Wed Jan 18, 2012 2:58 am- Forum: Problem Solving
- Topic: How many three-digit integers between 310 and 400? help...
- Replies: 13
- Views: 8805