Rowan
Andrew started saving at the beginning of the year and had saved $240 GMAT
Andrew started saving at the beginning of the year… …and had saved $240 by the end of the year. He continued to save and by the end of 2 years had saved a total of $540. Which of the following is closest to the percent increase in the amount Andrew saved during the second year … Read More
If 3/(10^4) = x%, then x = GMAT percents question
If 3/(10^4) = x%, then x = (A) 0.3(B) 0.03(C) 0.003(D) 0.0003(E) 0.00003 Never write the percent sign or use it in calculation. Always make x% = x/100 immediately. GMAT #GRE #Quant #MIM #MBA I need to write a few more things to make this human-friendly according to my SEO software, so let me tell … Read More
Debater: The average amount of overtime per month GMAT
Debater: The average amount of overtime per month GMAT Always consider outliers when you’re faced with an average. In this case, note that the Manufacturing Division DOES REPRESENT the company as a whole–we’re told that early in the question. Debater: The average amount of overtime per month worked by an employee in the manufacturing division … Read More
If the variables X, Y, and Z take on only the values GMAT
If the variables X, Y, and Z take on only the values… …10, 20, 30, 40, 50, 60, or 70 with frequencies indicated by the shaded regions above, for which of the frequency distributions is the mean equal to the median? (A) X only(B) Y only(C) Z only(D) X and Y(E) X and Z If … Read More
The infinite sequence a1, a2, …, an, … is such that a1=2 GMAT
The infinite sequence a1, a2, …, an, … is such that a1=2 The sum of the repeating sequence comes from simply figuring out how often the sequence repeats–in this case every 4 terms–and then adding this however many times the sequence itself fits into, in this case, 97. So that’s four terms sum to 3, … Read More
(n+1)^3 – ((n^3)+1) GMAT cubic binomial expansion
If n is a positive integer, which of the following could be equal to ((n+1)^3)−((n^3)+1)? A. 7^3(6^3−1) B. 7^3(6^3+1) C. 2∗26∗27 D. 3∗31∗32 E. 0 You can do this step-by-step by hand, but it will be a hell of a lot easier if you have the cubic expansion for a binomal handy: (a+b)^3 = a^3 … Read More