Hi - I understand the answer for this question, but I am having issues with the stem of the question: 1101 = (1 × 2^3) + (1 × 2^2) + (0 × 2^1) + (1 × 2^0) = 25 When I add this, I get 13: 8 + 4 + 0 + 1 What am I missing? Thanks! Question Every digit of a number written in binary is either 0 or 1....

Hi - I understand the answer for this question, but I am having issues with the stem of the question: 1101 = (1 × 2^3) + (1 × 2^2) + (0 × 2^1) + (1 × 2^0) = 25 When I add this, I get 13: 8 + 4 + 0 + 1 What am I missing? Thanks! Question Every digit of a number written in binary is either 0 or 1....

thank you for the explanation - just a quick question:

(c)
-9 < x - 1 < 9
-10 < x < 8
incorrect

should this be -8< x < 10 instead?

From GMAT Prep Exam If n is a positive integer and the remainder is r when (n-1)(n+1) is divided by 24, what is the value of r? (1) 2 is not a factor of n (2) 3 is not a factor of n Answer C I can see that from the statements, n is an odd integer not divisible by 3. This means that n-1 and n+1 are e...

From GMAT Prep exam

Is 2x-3y < x^2?

(1) 2x-3y = -2
(2) x>2 and y>0

Answer D

I don’t understand how to get this answer with the statements alone. I can see how to use them together, but not alone. Thanks!

From GMAT Prep Exam A certain car averages 25 miles per gallon of gasoline when driven in the city, and 40 miles per gallon when driven on the highway. According to these rates, which of the following is closest to the number of miles per gallon that the car averages when it is driven 10 miles in th...

thanks - I was having a difficult time getting to the 'divisible by 8' but now that makes sense!

not sure I follow you.

my answer (37.5) is wrong because it rounds up to 38...the correct answer is 36

thanks!

If we are told that the sides of a triangle are one of the right triangle ratios (ex: 3-4-5), can we always assume its a right triangle? Or is it possible to have a non-right triagle with those measurements?

I find it is helpful to draw a picture. If you draw a picture with a line that passes through the origin, and take statement 1, where the slope is negative, you see that the line has to go through only quad 2 and 4. So you can narrow a,b to being a point in either quad 2 or 4. In quad 2, a is -, and...

Hi Everyone, I am so pleased with my experience with Manhattan GMAT, I wanted to share this with everyone: At the end of March, I purchased all of the MGMAT books and studied them along with the MGMAT question banks. I studied the materials for 5 weeks and scored a 620 (Q 41, V35). I was not pleased...

I highly recommend the Manhattan GMAT materials and self-study course (the 9 pre-recorded classes). I tried studying all the materials by myself for a month and did not do that well, but then I watched the 9 classes and significantly increased my score. The classes really help you focus on the right...