Search found 106 matches
Re: Exponents
Can someone please explain this for me 5^21 * 2^22 = 2 * (5^21 * 2^21) and if you can kindly point me to a good tutorial for exponents thanks remember raising a number to a power is just a multiplication. Multiplication operations can be ordered any way and still achieve the same result. 2*3*5 = 3*...
- by marcusking
Wed Mar 11, 2009 8:31 am- Forum: Problem Solving
- Topic: Exponents
- Replies: 2
- Views: 1149
Re: OG DS - absolute value questn
If x and y are integers and y = |x+3|+|4-x| , does y equal 7 ? 1) x < 4 2) x > -3 Also , please explain a little how to solve these types of questions I am not able to do well in absolute value questions :/ 1) x must be less than 4 so x = 0 works x = 1 works x = 2 works x = 3 works but lets try - 1...
- by marcusking
Wed Mar 11, 2009 8:08 am- Forum: Data Sufficiency
- Topic: OG DS - absolute value questn
- Replies: 8
- Views: 1571
Re: camping
Similar to Vemuri I just factored a bit differently
xy = (x-x/2)(y+7)
xy = xy+7x-[xy/2]-[7x/2]
xy = [xy/2]+[7x/2]
2xy = xy+7x
xy = 7x
y = 7
B.
- by marcusking
Wed Mar 11, 2009 6:39 am- Forum: Data Sufficiency
- Topic: camping
- Replies: 9
- Views: 1789
given x+y != 0 the expression is a(x+y)/(x+y) hence knowing value of a will suffice. ALWAYS, ALWAYS, ALWAYS factor out whatever information is given in the question stem. [If its x^2+4x+4 make it (x+2)^2 if its (x-3)(x-3) make it x^2-6x+9] That being said look at this.... (ax+ay)/x+y => a(x+y)/(x+y...
- by marcusking
Wed Mar 11, 2009 6:16 am- Forum: Data Sufficiency
- Topic: Equation question - how??
- Replies: 4
- Views: 1391
Re: GMAT Prep Integer Question
A certain list consists of several different integers. is the product of all the integers in the list positive? (1) the product of the greatest and the smallest integer in the list is positive (2) there is an even number of integers in the list I get OA E but official OA is C . Can someone please e...
- by marcusking
Wed Mar 11, 2009 6:09 am- Forum: Data Sufficiency
- Topic: GMAT Prep Integer Question
- Replies: 5
- Views: 1573
How do you know the shaded region is half?bluementor wrote:The shaded region is half of the entire ABCD rectangular region.
Statement 1) Area of rectangle is given. Area of shaded region can be calcluated (i.e. half of area ABCD). Sufficient.
Statement 2) No info dimensional info. Insufficient.
Choose A.
-BM-
- by marcusking
Wed Mar 04, 2009 11:09 am- Forum: Data Sufficiency
- Topic: Area of shaded region.
- Replies: 4
- Views: 3897
Sorry I got t and n mixed up. You are correctDanaJ wrote:t = 21 is not consistent with "when positive integer t is divided by 5, the remainder is 2". The remainder when dividing t = 21 by 5 will be 1.
- by marcusking
Wed Mar 04, 2009 11:02 am- Forum: Data Sufficiency
- Topic: remainder - very interesting question
- Replies: 11
- Views: 3469
Re: Factory Q: Last Year vs Year End
How to resolve such questions quickly when the details areso confusing especially the verbatim? q: of 3000 cars manufactured in factory Q last year, how many were still in operation at the end of the year? 1) of all cars manufactured in Factory Q, 60% were still in operation at the end of year 2) A...
- by marcusking
Wed Mar 04, 2009 11:00 am- Forum: Data Sufficiency
- Topic: Factory Q: Last Year vs Year End
- Replies: 2
- Views: 1158
I initially wanted to solve this problem algebraically, but I soon realized it wouldn't take me far. So I started plugging in numbers... Now, let's analyze each stmt: 1. provides no new info: it's obvious that, since the remainder of dividing n to 3 is 2, n - 2 will be divisible by 3. This means th...
- by marcusking
Wed Mar 04, 2009 10:57 am- Forum: Data Sufficiency
- Topic: remainder - very interesting question
- Replies: 11
- Views: 3469
Re: shaded semicircles
In the figure attached, the circle has center Y and the four shaded semicircles each have area 18 pi. What is the circumference of the circle? (A) 24 pi (B) 30 pi (C) 36 pi (D) 48 pi (E) 60 pi If semi circle is 18pi full circle must be 36pi meaning r of semi circle must be 6 so each semi circles di...
- by marcusking
Wed Mar 04, 2009 10:05 am- Forum: Problem Solving
- Topic: shaded semicircles
- Replies: 6
- Views: 1641
This is a common problem that I struggle with too when I'm going to fast.deepoe wrote:Oh nevermind! I already saw it!!! Need to divide 240 with 5 :$
- by marcusking
Wed Mar 04, 2009 9:17 am- Forum: Problem Solving
- Topic: Averaged speed City A to City B
- Replies: 4
- Views: 1033
Re: Beaten by the GMAT
Just got out of my first GMAT ... Total : 580 - 60% Q: 50 - 94% V: 19 - 16% Learned for the Verbal part only for more than a month. Will try again at mid May. :-\ Wow your quant score is IMPRESSIVE. You obviously know what you need to work on. Do you know what area in verbal you a specifically stuc...
- by marcusking
Wed Mar 04, 2009 9:10 am- Forum: I just Beat The GMAT!
- Topic: Beaten by the GMAT
- Replies: 3
- Views: 1819
Re: Alan Boris Charles Dave
At the beginning of 2006, both Alan and Dave were taller than Boris, and Boris was taller than Charles. During the year, Alan grew 2 inches, Boris and Dave each grew 4 inches, and Charles grew 3 inches. Of the following, which could NOT have been true at the beginning of 2007? (A) Alan was shorter ...
- by marcusking
Wed Mar 04, 2009 9:02 am- Forum: Problem Solving
- Topic: Alan Boris Charles Dave
- Replies: 4
- Views: 3083
Re: in cubic feet
SA = 2(10*3) + 2(10*x) + 2(3*x)sanju09 wrote:The rectangular solid attached has surface area 112 square feet. What is the volume, in cubic feet, of the solid?
(A) 30
(B) 45
(C) 60
(D) 72
(E) 90
112 = 60 + 20x + 6x
52 = 26x
x = 2
Volume = 10 * 3 * 2
Volume = 60 C.
Please start posting the OA.
- by marcusking
Wed Mar 04, 2009 8:58 am- Forum: Problem Solving
- Topic: in cubic feet
- Replies: 4
- Views: 1446
Re: Company X greatest
The bar graph attached shows the number of employees at Company X for each of the years from 1996 through 2000. Over which of the following periods was the average rate of increase in the number of employees at Company X greatest? (A) From 1996 through 1998 (B) From 1996 through 1999 (C) From 1997 ...
- by marcusking
Wed Mar 04, 2009 8:50 am- Forum: Problem Solving
- Topic: Company X greatest
- Replies: 4
- Views: 1447