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
Honestly I think the answer is fairly easy to see here. Students hardly ever get this correct. Can you? Which of the following most logically completes the argument? The irradiation of food kills bacteria and thus retards spoilage. However, it also lowers the nutritional value of many foods. For example, irradiation destroys a significant percentage … Read More
If 4 is less than (7−x), which of the following must be true? I. 5 is less than xII. |x+3| is greater than 2III. −(x+5) is positive (A) II only(B) III only(C) I and II only(D) II and III only(E) I, II and III Remember to hold the given facts true throughout the question.
In this case, note that the price of oil is a terrible thing to measure. The measurement needs to be something that Hotco and Clifton have control over, such as the amount of oil consumed. Hotco oil burners, designed to be used in asphalt plants, are so efficient that Hotco will sell one to the … Read More
There are 5 cars to be displayed in 5 parking spaces with all the cars facing the same direction. Of the 5 cars, 3 are red, 1 is blue and 1 is yellow. If the cars are identical except for color, how many different display arrangements of the 5 cars are possible? (A) 20(B) 25(C) … Read More
The subsets of the set {w, x, y} are {w}, {x}, {y}, {w, x}, {w, y}, {x, y}, {w, x,y}, and { } (the empty subset). How many subsets of the set {w, x, y, z} contain w ? (A) Four(B) Five(C) Seven(D) Eight(E) Sixteen In this case you could figure out the number based … Read More
Introduction Well we were promised that when the Focus Edition came out, they were only subtracting information from the GMAT rather than adding it. And then we find Completing the Square questions on the test. This is a quadratics topic that was never in the GMAT curriculum before FE, so you do the math on … Read More
GMAT Number of Factors: How to Count the Possible Divisors of a Number One of the recent additions to the GMAT content sphere is questions that ask you to count the total number of factors of a number rather than simply the number of prime factors. That is, all factors, not just the prime ones. … Read More