Rowan The thing to notice here is that every even number has a 2 in it. You can pull all these 2s to the front of the number, which turns a sequence of consecutive evens like this into a string of consecutive numbers (evens and odds). From here, you can see where the larger prime factor … Read More
The function f is defined for each positive three-digit integer n by , where x, y and z are the hundreds, tens, and units digits of n, respectively. If m and v are three-digit positive integers such that then ? (A) 8(B) 9(C) 18(D) 20(E) 80 The real trick here is to think about f(m) … Read More
Look at what you’re trying to do: reduce the amount of ash by reducing the number of truckloads. Fewer truckloads does not necessarily mean less ash. If you were the corporate lawyer, your job would be to figure out how to reduce the number of truckloads while keeping the amount of ash exactly the same. … Read More
This is rated hard. Why? Mostly it’s picking what to do quickly. First eliminate the mixed numbers, then cancel the 15s in the bottom–don’t flip and multiply if possible. https://stan.store/yourgmatcoach FREE Factoring Magic Video Course: https://stan.store/yourgmatcoach/p/gmat-factoring-magic-8video-course- (2 3/5− 1 2/3)/(2/3 – 3/5) (A) 16(B) 14(C) 3(D) 1(E) -1
The question you want to ask yourself–no matter how weird it sounds on the surface–is this: does swimming cause asthma, or does asthma cause swimming. In this case, you’ll find out that quite possibly asthma causes swimming. Which of the following most logically completes the argument given? Asthma, a chronic breathing disorder, is significantly more … Read More
Just focus on how many zeros there are after the 1. That’s 50, so 51 digits. Subtract the 74 and that leaves a 50-digit number with 26 at the end. That’s pretty much it. If 10^50–74 is written as an integer in base 10 notation, what is the sum of the digits in that integer? … Read More
Survivorship bias is when you make a judgement based on surviving examples only. “Music was better in the 1960s.” Maybe, but you’re only listening to the good stuff because that’s all we hear now. You aren’t hearing all the crap that was played on the radio back then. Guidebook writer: I have visited hotels throughout … Read More
A couple decides to have 4 children. If they succeed… Find the number of ways to select “exactly two boys and two girls” and then calculate the probability for one of these ways. Then multiply these two terms together. A couple decides to have 4 children. If they succeed in having 4 children and each … Read More
Here’s my recent appearance on the Testing Ain’t Easy podcast with Stefan Maisnier from MyGuru tutoring! Testing Ain’t Easy with MyGuru Tutoring – News & Opinions on the Dynamic World of Modern Academic, Admissions, and Professional Standardized Tests n this podcast, MyGuru Director of Instruction Stefan Maisnier welcomes #gmat expert, Rowan Hand to discuss the … Read More
