Search found 484 matches


easy one

How many liters of an acid solution with no salt content should be mixed with 35 liters of a saline solution with 40% salt content to yield a 32% saline solution?

(A) 4.12
(B) 8.75
(C) 18
(D) 35
(E) 43.75

by magical cook

Mon Jan 28, 2008 9:43 am
Forum: Problem Solving
Topic: easy one
Replies: 2
Views: 1599

medium question

There are 68 children in the cafeteria of a school and all of the children have something for lunch. Thirty-four of the children brought lunches from home, 23 of the children bought a drink from the cafeteria beverage machine, and 32 of the children bought fruit in the cafeteria. If 18 children did ...

by magical cook

Wed Jan 23, 2008 4:12 pm
Forum: Problem Solving
Topic: medium question
Replies: 2
Views: 1825

Thanks, this is not official question, so quesion might not be so properly written. :cry:

by magical cook

Wed Jan 23, 2008 3:46 pm
Forum: Data Sufficiency
Topic: medium question
Replies: 2
Views: 1523

medium question

How many people bought TVs at the Electronics Depot?

(1) If six Electronics Depot customers are chosen at random, one of the six bought a TV.
(2) If four Electronics Depot customers are chosen at random there are 100 different groups of people that could be chosen.

by magical cook

Wed Jan 23, 2008 1:42 pm
Forum: Data Sufficiency
Topic: medium question
Replies: 2
Views: 1523

sorry for the confusion. forget about the first (1) that's from somewhere...

anyway, I first thought D too but answer is B. thanks

by magical cook

Wed Jan 23, 2008 5:41 am
Forum: Data Sufficiency
Topic: another simple one
Replies: 6
Views: 1761

another simple one

In the telephone number 936-215X, what digit does X represent?

(2) The perimeter of floor X is 16 meters.
(1) Only one digit in the telephone number is greater than X.
(2) X is the greatest of the digits not among the telephone number’s first six digits.

by magical cook

Tue Jan 22, 2008 9:46 pm
Forum: Data Sufficiency
Topic: another simple one
Replies: 6
Views: 1761

simple one

For any numbers a and b, a · b = a + b – ab.
If a · b = 0, which of the following CANNOT be a value of b?
(A) 2
(B) 1
(C) 0
(D) -1
(E) -2/3


simple but I got it wong... OA will follow. can you pls explain?

by magical cook

Tue Jan 22, 2008 9:35 pm
Forum: Problem Solving
Topic: simple one
Replies: 2
Views: 1400

triangle

Hi,


I think answer should be B but want to know how to get the length of b..

by magical cook

Mon Jan 21, 2008 10:03 am
Forum: Data Sufficiency
Topic: triangle
Replies: 4
Views: 1937

thank you - I think it's correct. (no OA)

by magical cook

Mon Jan 21, 2008 10:01 am
Forum: Data Sufficiency
Topic: geometry
Replies: 3
Views: 1654

geometry

What is the difference in the circumferences of circles A and B?

(1) The difference in the areas of the two circles is 4.
(2) The difference in radii of the two circles is 2.

by magical cook

Mon Jan 21, 2008 9:17 am
Forum: Data Sufficiency
Topic: geometry
Replies: 3
Views: 1654

thanks for clear out my doubt... :)

by magical cook

Sun Jan 06, 2008 5:07 pm
Forum: Data Sufficiency
Topic: ps
Replies: 4
Views: 1836

thanks,

1) is def sufficient

but for 2) x^2 = 36 is +/- 6, so I was not sure if it's okay to say suff for the answewr -6..

by magical cook

Sun Jan 06, 2008 4:59 pm
Forum: Data Sufficiency
Topic: ps
Replies: 4
Views: 1836

ps

if lx+2l =4 , what is the value of x?

1) x^2 is NOT 4

2) x^2 = 36

by magical cook

Sun Jan 06, 2008 3:50 pm
Forum: Data Sufficiency
Topic: ps
Replies: 4
Views: 1836

Ahh, I think I mislead the question "xyz" are even... oops

by magical cook

Sat Jan 05, 2008 8:53 pm
Forum: Data Sufficiency
Topic: missing somethin?
Replies: 5
Views: 2124

missing somethin?

If x, y and z are positive integers, is xz even?

1) xy is even

2) yz is even

by magical cook

Sat Jan 05, 2008 8:42 pm
Forum: Data Sufficiency
Topic: missing somethin?
Replies: 5
Views: 2124