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Prob Logic

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?

5 minutes
6 minutes
8 minutes
9 minutes
10 minutes

by Sher1

Mon Aug 24, 2009 1:44 pm
Forum: Problem Solving
Topic: Prob Logic
Replies: 2
Views: 1353

It's from a Gmatclub exam.

by Sher1

Sat Aug 22, 2009 2:15 pm
Forum: Sentence Correction
Topic: Verbally
Replies: 12
Views: 2452

OA is B, but I didn't buy it. I see someone chose B as an OA. Please provide further details why D was not right.

by Sher1

Sat Aug 22, 2009 9:32 am
Forum: Sentence Correction
Topic: Verbally
Replies: 12
Views: 2452

Verbally

Our understanding was that she would continue to cover the costs of school enrollment and room and board for the children, which she verbally agreed to pay with the rest of the family. A which she verbally agreed to pay with the rest of the family. B which she agreed verbally with the rest of the fa...

by Sher1

Fri Aug 21, 2009 10:17 pm
Forum: Sentence Correction
Topic: Verbally
Replies: 12
Views: 2452

The best approach for problems like these is to the choose logical numbers.

23-5y

try a few values which would make this the smallest number possible

23-5(1)
18
23-5(2)
13
23-5(3)
10
23-5(4)
3
23-5(5)
2
23-5(6)
7
and keeps growing. so the smallest value is 2.

by Sher1

Wed Aug 19, 2009 8:28 pm
Forum: Problem Solving
Topic: OG 12, Q 50.
Replies: 2
Views: 1426

Re: x,y, z

1) |y + z| = |y| + |z| --> this implies that both y and z are positive. e.g. if y=1 and z=-2 then |(+1) + (-2)| = -1 but |+1| + |-2| = 3 so y and z must both be positive for the eqn to hold. This however, still doesn't tell us about x (it couldn be +ve or -ve, all we know about z form the given inf...

by Sher1

Fri Aug 14, 2009 3:22 pm
Forum: Data Sufficiency
Topic: x,y, z
Replies: 8
Views: 1680

y<z

st 1 y+z = 1
Maybe
y = 0 z =1

or

y =1 z=0

st 2


y=1 z=2

y^2<z^2
y<z
or

y=1 z=-2
Y^2<z^2
but y>z

Together

y=1-z

(1-z)^2<z^2
1-2z<0
z>1/2

Since y-z=1
y<z

by Sher1

Fri Aug 14, 2009 3:14 pm
Forum: Data Sufficiency
Topic: Is Y<Z?
Replies: 2
Views: 1414

Ashish can you clarify.

by Sher1

Thu Aug 13, 2009 2:13 pm
Forum: Problem Solving
Topic: How many times q
Replies: 12
Views: 5657
by Sher1

Thu Aug 13, 2009 2:09 pm
Forum: Problem Solving
Topic: Tough One
Replies: 4
Views: 2920

Tough One

A car dealership sold two cars: the first car at a 10% profit and the second car at a 10% loss, which gave them an overall profit margin of 5% from these two sales. If the dealership's total profit was $1000, what was the sale price of each car? $5,000 and $1,000 $9,000 and $5,000 $11,000 and $9,000...

by Sher1

Wed Aug 12, 2009 6:58 pm
Forum: Problem Solving
Topic: Tough One
Replies: 4
Views: 2920

How many times q

How many times will the digit 7 be written when listing the integers from 1 to 1000?


A 110
B 111
C 271
D 300
E 304

Any shortcut to solving this

by Sher1

Wed Aug 12, 2009 1:41 pm
Forum: Problem Solving
Topic: How many times q
Replies: 12
Views: 5657

Commerce Department

The rise in the Commerce Department’s index of leading economic indicators s uggest that the economy should continue its expansion into the coming months, but that the mixed performance of the index’s individual components indicates that economic growth will proceed at a more moderate pace than in t...

by Sher1

Tue Aug 11, 2009 5:03 am
Forum: Sentence Correction
Topic: Commerce Department
Replies: 3
Views: 3947

B If the average length of 5 is 124, then total length is 620. Median is 140 so the middle one is 140. To maximize the lowest, we have to minimize the others. Lets say the pieces are 1,2,3,4,5 we know 3 is 140, 4 and 5 at the minimum will be 140 as well. now 620-420 is the lenght of the shortest 2 t...

by Sher1

Sun Aug 09, 2009 8:56 am
Forum: Problem Solving
Topic: mean
Replies: 2
Views: 1161

I also thought the answers should be none. This is a Manhattan Gmat challenge question I found on MBA mission. Below is the exp if anyone can make sense of it please share.


http://www.mbamission.com/blog/2009/08/ ... llenge-63/

by Sher1

Fri Aug 07, 2009 11:50 am
Forum: Problem Solving
Topic: Commutator
Replies: 5
Views: 1786

Commutator

For any operation ? that acts on two numbers x and y, the commutator is defined as x?y – y?x. For which of the following operations is the commutator not equal to zero for some values of x and y? I. x?y = xy II. x?y = (x – y)^2 III. x?y = x^3 + 3x^2y + 3xy^2 + y^3 (A) I only (B) II only (C) III only...

by Sher1

Thu Aug 06, 2009 9:20 pm
Forum: Problem Solving
Topic: Commutator
Replies: 5
Views: 1786