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Hello, Can you please assist with this? Which of the following points lies outside circle x^2 + y^2 = 25? (A) (4, 3) (B) (-4, -3) (C) (9, 6) (D) (2, 2) (E) (2, 4) OA: C Thanks a lot, Sri The general equation for a circle with center (A,B) and radius r is: (x-A)^2 + (y-B)^2 = r^2 Comparing this with...

by ganeshrkamath

Sun Jan 19, 2014 9:00 pm
Forum: Problem Solving
Topic: To find the points outside the circle
Replies: 4
Views: 1461

Hello, Can you please assist with this: Sixty percent of the population of town X are employed; of those employed 40% are men, what percentage of the total population are employed women? (A) 12 (B) 24 (C) 36 (D) 40 (E) 60 OA: C My approach is as shown in the double set matrix. I was thinking that 3...

by ganeshrkamath

Sun Jan 19, 2014 8:56 pm
Forum: Problem Solving
Topic: To find the percentage of employed women
Replies: 3
Views: 1159

Hello, Can you please assist with this: In a sequence X1, X2, X3,… Xn, ….. ; Xn+3 = Xn+2 + Xn+1 + Xn, is X8 odd? (1) X1 is odd (2) Exactly one of the terms X1, X2, and X3 is odd OA: B Thanks a lot, Sri X4 = X1 + X2 + X3 X5 = X2 + X3 + X4 = X2 + X3 + (X1 + X2 + X3) = X1 + 2X2 + 2X3 X6 = X3 + X4 ...

by ganeshrkamath

Sun Dec 22, 2013 8:45 pm
Forum: Data Sufficiency
Topic: Is the term odd?
Replies: 2
Views: 1339

Hello, Can you please assist with this: In a coordinate system, how many points (x,y) simultaneously satisfy the conditions |x| + |y| ≤ 1 and x^2 + y^2 = 1? (A) exactly one (B) exactly two (C) exactly three (D) exactly four (E) infinite points OA: D Thanks, Sri Some points that satisfy |x| + |y| ...

by ganeshrkamath

Sun Dec 22, 2013 8:27 pm
Forum: Problem Solving
Topic: Co-ordinate system question
Replies: 2
Views: 1336

A rectangular solid is changed such that the width and length are increased by 1 inch apiece and the height is decreased by 9 inches. Despite these changes, the new rectangular solid has the same volume as the original rectangular solid. If the width and length of the original rectangular solid are...

by ganeshrkamath

Thu Dec 12, 2013 6:16 am
Forum: Problem Solving
Topic: A rectangular solid is changed
Replies: 4
Views: 1981

If the operation # is defined for all integers a and b by a#b = a+b-ab, which of the following statements must be true for all integers a, b and c? I. a#b = b#a II. a#0 = a III. (a#b)#c = a#(b#c) - I only - II only - I and II only - I and III only - I, II and III only I. a#b = a+b-ab = b+a-ba = b#a...

by ganeshrkamath

Wed Dec 11, 2013 9:34 pm
Forum: Problem Solving
Topic: best way to solve this symbolism?
Replies: 1
Views: 1028

A thin piece of wire 40 meters long is cut into two pieces. One piece is used to form a circle with radius r, and the other is used to form a square. No wire is left over. Which of the following represents the total area, in square meters, of the circular and the square regions in terms of r? A. pi...

by ganeshrkamath

Wed Dec 11, 2013 9:28 pm
Forum: Problem Solving
Topic: A thin piece of wire 40 meters long is cut into two pieces.
Replies: 8
Views: 7755

how many such numbers are there between 1 and 500 which are multiples of 3 and 7 or of both 3 and 7??? 211 212 213 214 Multiples of 3: 3,6,9,....,498 Total = (498 - 3)/3 + 1 = 495/3 + 1 = 165+1 = 166 Multiples of 7: 7,14,21,...,497 Total = (497 - 7)/7 + 1 = 490/7 + 1 = 70 + 1 = 71 Multiples of (3*7...

by ganeshrkamath

Sun Dec 08, 2013 2:45 am
Forum: Problem Solving
Topic: help asap!! plzz!!
Replies: 4
Views: 1220

A man cycling along the road noticed that every 12 minutes a bus overtakes him and every 4 minutes he meets an oncoming bus. If all buses and the cyclist move at a constant speed, what is the time interval between consecutive buses? A. 5 minutes B. 6 minutes C. 8 minutes D. 9 minutes E. 10 minutes ...

by ganeshrkamath

Sun Dec 08, 2013 2:39 am
Forum: Problem Solving
Topic: Speed - Problem
Replies: 7
Views: 1682

Are you sure its [spoiler]{B}? [/spoiler] ; I got [spoiler]{D}[/spoiler] student : faculty = R : 1 S/F = R/1 Faculty will increase by f% ==> F + Ff/100 ==> F (1 + f/100) Students will decrease by S% = S - Ss/100 ==> S ( 1 - s/100) S ( 1 - s/100) / F (1 + f/100) R ( 100 - s)/(100 + f) I myself reach...

by ganeshrkamath

Tue Nov 26, 2013 1:18 am
Forum: Problem Solving
Topic: The number of students per faculty member
Replies: 8
Views: 1724

Right now, the number of students per faculty member is R. In 5 years, the number of faculty members will be increased by F% and the number of students will be decreased by S%. Which of the following represents the number of students per faculty member after the change? A)R B)R^-1 C)(100+S)/(100+F)...

by ganeshrkamath

Mon Nov 25, 2013 11:20 pm
Forum: Problem Solving
Topic: The number of students per faculty member
Replies: 8
Views: 1724

The Man in Picture is absconding since two days after The Murder of Roger Ackroyd. His Aid was caught by the Cops 11 days after The Murder of Roger Ackroyd or 5 days after The Absconding Man in Picture was Caught on Camera by a Media Person on 21 June 1926. If The Murder of Roger Ackroyd took place...

by ganeshrkamath

Fri Nov 22, 2013 2:50 am
Forum: Problem Solving
Topic: The Man in Picture
Replies: 2
Views: 1132

One night a certain motel rented 3/4 th of its rooms, including 2/3rd of its air-conditioned rooms. If 3/5th of its rooms were air-conditioned, what percent of the rooms that were not rented were air-conditioned? (A) 20% (B) 33*1/3% (C) 35% (D) 40% (E) 80% Q/A- E Let T be the total number of rooms ...

by ganeshrkamath

Wed Nov 20, 2013 7:36 pm
Forum: Problem Solving
Topic: motel
Replies: 4
Views: 7356

A group of pictures of butterflies contains 10 pictures. Jim had bought 3 of them. If 2 pictures are to be picked out from the 10 pictures, what is the probability that both pictures are not those that were already bought by Jim? 14/15 3/5 6/13 7/15 7/10 [spoiler]OA D I did: Total number of ways to...

by ganeshrkamath

Wed Nov 20, 2013 6:26 am
Forum: Problem Solving
Topic: A group of pictures of butterflies contains 10 pictures
Replies: 5
Views: 1895

A group of pictures of butterflies contains 10 pictures. Jim had bought 3 of them. If 2 pictures are to be picked out from the 10 pictures, what is the probability that both pictures are not those that were already bought by Jim? 14/15 3/5 6/13 7/15 7/10 [spoiler]OA D I did: Total number of ways to...

by ganeshrkamath

Wed Nov 20, 2013 6:23 am
Forum: Problem Solving
Topic: A group of pictures of butterflies contains 10 pictures
Replies: 5
Views: 1895