GMAT Videos

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

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