Search found 32 matches


Sorry to bother. I just realised my imbecility. :( Instead of work, i was trying match up the 4 times to rate. Corrected in the below now. :) I'm usually good with rate problems, this one has got me confused. How do I set this up? I'm comfortable with the pie method or the chart method. Thanks in ad...

by LeoBen

Tue Feb 14, 2012 4:13 pm
Forum: Problem Solving
Topic: rate problem
Replies: 4
Views: 1346

I'm usually good with rate problems, this one has got me confused. How do I set this up? I'm comfortable with the pie method or the chart method. Thanks in advance for the help. Caroline's and Carl's Cupcakes receive an order for a certain number of cupcakes. Caroline takes eight hours to complete ...

by LeoBen

Tue Feb 14, 2012 3:44 pm
Forum: Problem Solving
Topic: rate problem
Replies: 4
Views: 1346

good one pemdas.

perhaps you should have been more wicked -- by adding an answer choice such as 21!/7!(3!)^7 :twisted:

Cheers,
LB

by LeoBen

Sat Feb 04, 2012 5:47 am
Forum: Problem Solving
Topic: post mails
Replies: 13
Views: 2662

ratio = 2:3:4:5:6 lets consider the multiple as 1 -- bcz the answer needs ratio itself. total quantity = 2+3+4+5+6 = 20. capacity = 5/2 (quantity) = 5/2 x 20 = 50. capacity per glass = 50/5 (as each of the 5 glasses has equal capacity) = 10 question hence = no. of glasses >= half of 10 full i.e. >=5...

by LeoBen

Thu Jan 26, 2012 12:53 pm
Forum: Problem Solving
Topic: Ratio and Proportion
Replies: 3
Views: 1487

Tokens and ways

There are 100 tokens numbered from 1 to 100. In how many ways can two tokens be drawn simultaneously so that their sum is more than 100? 4950 5050 2500 2550 5000 I got the above Problem on the daily problems. I wasn't able to construe the explanation in the link. So I thought to post a new thread. W...

by LeoBen

Sat Jan 21, 2012 2:03 pm
Forum: Problem Solving
Topic: Tokens and ways
Replies: 2
Views: 1307

The World Wildlife Fund has declared that global warming, a phenomenon most scientists agree to be caused by human beings in burning fossil fuels , will create havoc among migratory birds by altering the environment in ways harmful to their habitats. (A) a phenomenon most scientists agree to be caus...

by LeoBen

Sat Jan 21, 2012 8:26 am
Forum: Sentence Correction
Topic: have no idea about this one OG12 #118
Replies: 2
Views: 2143

is a > c? 1. b > d ==> no clue on a or c given --so insuff 2. ab^2 - b > b^2 c - d ==> no clue of b & d -- so insuff eliminated AD, B. contest for C ab^2 - b > b^2 c - d ==> rearrange b sq to left and b to right -- ab^2 - b^2c > b - d b^2 (a-c) > b - d now we know b > d hence right is + ve. Ther...

by LeoBen

Mon Jan 16, 2012 1:24 pm
Forum: Data Sufficiency
Topic: Is a > c?
Replies: 4
Views: 1373

Does the below make sense -- though it yields the same answer I am not sure whether my logic is correct. p(neither together) = 1 - p(both with their mates) solving positive event. consider couples as unit -- AA BB S there are 3! ways of arranging the above 2!^2 ways between the couple 3 ways in whic...

by LeoBen

Sun Jan 15, 2012 12:19 pm
Forum: Problem Solving
Topic: Couples - Probability
Replies: 6
Views: 2983

ArunangsuSahu wrote:Small mistake by You

Wednesday=1st, 8th,15th,22nd

So 3
Thanks for saying "small" when it was indeed stupid :) [in my defence: i was running short of time in cat ;)]

by LeoBen

Sat Jan 14, 2012 11:09 am
Forum: Problem Solving
Topic: Marina & her croissants
Replies: 2
Views: 1324

Marina & her croissants

Every Monday, Marina eats one croissant and every Tuesday she eats two croissants. On each subsequent day of the week, she eats a number of croissants equal to the sum of the croissants eaten on the two previous days, with the exception that if she eats more than four croissants on any particular da...

by LeoBen

Sat Jan 14, 2012 10:51 am
Forum: Problem Solving
Topic: Marina & her croissants
Replies: 2
Views: 1324

Slot method

Car 1 X 2 X 3 = _ X _ X _

so 8 X 6 X 4.

The above can be arranged in 3! ways, hence reduces the no. of ways --> 8X6X4/3! = 32

by LeoBen

Tue Jan 10, 2012 5:37 am
Forum: Problem Solving
Topic: 3 cars selection
Replies: 7
Views: 2045

variables, i is income, s is saving, o is spending Matrix for info -------Year 1-----Year 2 Save----s ----------0 Spend---o --------s(1+r) Income--i-----------0 wat's asked = s/i year 1: i = s + o year 2: i = 0 + s(1+r) => given spending year 2 = saving of year 1 (1+r) give => spending of year 1 = t...

by LeoBen

Sun Jan 08, 2012 12:45 pm
Forum: Problem Solving
Topic: OG12-ps-qn-163
Replies: 4
Views: 2323

Oh yes - my mistake. Ofcourse order doesnt matter, so RB or BR its just the same as per the stem i missed it I guess.

Thanks Pemdas

by LeoBen

Fri Jan 06, 2012 12:02 am
Forum: Problem Solving
Topic: Chemicals color coding system
Replies: 3
Views: 4537

Chemicals color coding system

In a certain lab, chemicals are identified by a color coding system. There are 20 different chemicals. Each is coded with either a single color or a unique two color combination. If the order of colors in the pairs doesnt matter, what is the miniumum number of different colors needed to code all 20 ...

by LeoBen

Wed Jan 04, 2012 4:28 pm
Forum: Problem Solving
Topic: Chemicals color coding system
Replies: 3
Views: 4537

faster m/c rate = k/4

slower m/c rate = k/8

slower on the critical path, with total time, faster would be 8/12 x 100 % = 66.66 %

by LeoBen

Wed Jan 04, 2012 6:22 am
Forum: Problem Solving
Topic: Machine work
Replies: 5
Views: 1637