Search found 35 matches


Product from 1 to 20 [b]20/2[/b] = 10 ---------for all numbers divisible by 2^1 [b]20/4[/b] = 5 -----------for all numbers divisible by 2^2 [b]20/8[/b] = 2.5 ---------for all numbers divisible by 2^3 [b]20/16 [/b]= 1.25-------for all numbers divisible by 2^4 [b]20/32 [/b]= 0.625------for all numbers...

by manulath

Tue Dec 30, 2008 5:12 am
Forum: Problem Solving
Topic: greatest integer
Replies: 14
Views: 4850

Let Red cars be R, Black cars be B

R:B = 3:8

or R/B = 3/8

R = B*3/8

we know B= 72

so R = 72*3/8 = 27

.......................................

by manulath

Mon Sep 29, 2008 12:33 am
Forum: Problem Solving
Topic: ratios
Replies: 3
Views: 1362

one was used to form a circle of radiur r hence circumfrence = 2pi.r let the two parts = x and y such that x + y = 40 let x be used to make circle. Hence x = 2pi.r y = 40 - 2pi.r y formed a square. Perimeter of square = 4*side = 40 - 2pi*r side = 10 - pi*r/2 Area: Circle = pi*r^2 Square = (10 - pi*r...

by manulath

Sun Sep 28, 2008 11:41 pm
Forum: Problem Solving
Topic: gmat prep question
Replies: 1
Views: 1207

what is OA?

by manulath

Sun Sep 28, 2008 11:22 pm
Forum: Problem Solving
Topic: ps4
Replies: 6
Views: 1912

including the both axis, it forms a trapezoid deduct the area of two triangle from the area of trapezoid. METHOD II: CO-ORDINATE by quick glance you can see that both triangles are 3-4-5 triangles hence two sides are 5 each also the lines are perpendicular to each other (can be verified by the slope...

by manulath

Sun Sep 28, 2008 10:36 pm
Forum: Problem Solving
Topic: geometry
Replies: 2
Views: 1297

Agreed that 118 is a valid answer

if I had to choose among 116, 118 - I would have taken 116!

that was the only reason why i went for 116.

by manulath

Sun Sep 28, 2008 10:15 pm
Forum: Problem Solving
Topic: Distance and speed
Replies: 5
Views: 1504

C: 57

three consec number are to be divisible by 3

n, n+1, n+2
sum = 3n + 3 = which is divisible by 3
only 57 satisfies the req

...................................................

by manulath

Sun Sep 28, 2008 9:22 am
Forum: Problem Solving
Topic: Sum of Integers
Replies: 3
Views: 1530

I would go with A: 116 whats OA? let distance be x 1 st person: speed = x/4 25<x/4<45 ............mulitply by 4 100<x<180 2nd peson: speed = x/2 45<x/2<60................multiply by 2 90<x<120 combinig the equations............... 100 < x < 120 leaves two choices, 116 and 118 116 divisible by 4, 118...

by manulath

Sun Sep 28, 2008 9:17 am
Forum: Problem Solving
Topic: Distance and speed
Replies: 5
Views: 1504

question seems incomplete?

by manulath

Sun Sep 28, 2008 9:08 am
Forum: Problem Solving
Topic: positive integers
Replies: 6
Views: 1682

well just try and add the probabilities for 2 hits, 3 hits, 4 hits and 5 hits i still had 47/128 (4^5 - 3^5 - 5*3^4) / 4^5 -3^5 - 5*3^4 can be simplified to -3^4(3+5) = 8*3^4 hence numerator becomes 4^5 - 8*3^4 4^5 = 2^10 = 2^3*2^5 = 8*2^5 = 8*128 3^4 = 81 8*128 - 8*81 = 8*47 ans= 8*47 / 4^5 = 8*47/...

by manulath

Sun Sep 28, 2008 8:55 am
Forum: Problem Solving
Topic: prob prob
Replies: 5
Views: 1342

This question is slightly diff as it asks prob for ATLEAST 2 times find probalility of no hit + probability of exactly 1 hit then subtract the sum from 1 probability of hit = 1/4 probability of miss = 3/4 5 try - no hits = (3/4)^5 1 hit= 5C1*(1/4)*(3/4)^4 = 5*3^4/4^5 At least two hits = 1 - (3/4)^5 ...

by manulath

Sun Sep 28, 2008 7:23 am
Forum: Problem Solving
Topic: prob prob
Replies: 5
Views: 1342

This question is slightly diff as it asks prob for ATLEAST 2 times find probalility of no hit + probability of exactly 1 hit then subtract the sum from 1 probability of hit = 1/4 probability of miss = 3/4 5 try - no hits = (3/4)^5 1 hit= 5C1*(1/4)*(3/4)^4 = 5*3^4/4^5 At least two hits = 1 - (3/4)^5 ...

by manulath

Sun Sep 28, 2008 7:22 am
Forum: Problem Solving
Topic: prob prob
Replies: 5
Views: 1342

similar question was posted earlier. See the link

http://www.beatthegmat.com/arrows-proba ... 18789.html

by manulath

Sun Sep 28, 2008 7:12 am
Forum: Problem Solving
Topic: prob prob
Replies: 5
Views: 1342

Re: Contidional Probability?

[quote="sumithshah"]If the probability of Ben being the winner is ,


Please correct the question. Data missing.

by manulath

Sun Sep 28, 2008 3:17 am
Forum: Problem Solving
Topic: Contidional Probability?
Replies: 7
Views: 1862

please check the question, it is missing data - prababilities!
regards

by manulath

Sat Sep 27, 2008 11:58 pm
Forum: Problem Solving
Topic: Contidional Probability?
Replies: 7
Views: 1862