How many even multiples of 3 are there between 127 and 390? A. 41 B. 42 C. 43 D. 84 E. 85 [spoiler]C.[/spoiler] Solution: Find the first and last even multiples of 3 within the range: 132 and 384. Find the number of numbers in the range (inclusive) 384-132 + 1 = 253. Divide that […]
GMAT Question of the Day – Number Properties – April 23rd Read the Full Article »
If f(x) is defined as the largest integer k such that x is divisible by 3^k, which of the following has the greatest value? A. f(9) B. f(24) C. f(32) D. f(62) E. f(93) [spoiler]A.[/spoiler] Solution: What is this question really asking? Which of the following has the most 3’s as factors. 9 has two
GMAT Question of the Day – PS Exponents – April 22nd Read the Full Article »
What is the value of x? (1) x^6 = |x| (2) x^3 = x [spoiler]E.[/spoiler] Solution: Statement (1): This tells us that x must be 1, -1, or 0. No other number will satisfy this equation. Insufficient. Statement (2): This also tells us that x must be 1, -1, or 0. Insufficient. Statement (1) +
GMAT Question of the Day – DS Exponents – April 21st Read the Full Article »
The GMAT Khan Academy We are hit over the head over and over again about how the GMAT is not a content test and how you only need the most basic quant skills to do perfectly well on the GMAT. That’s true. And in fact most of the essential GMAT math skills you probably learned
GMAT Khan Academy: a guide to basic GMAT Quant Read the Full Article »
Although City A produces three times as much power as City B does, the cities produce and equal amount of power from coal fired power plants. If M% of City A’s power comes from coal fired power plants then in terms of M what percent of City B’s power comes from coal fired power plants?
GMAT Question of the Day – Word Problem – April 18th Read the Full Article »
