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
Ultimate Guide to GMAT Geometry, Part II: Polygons, Perimeter and Area, Parallelograms Chapter 5: Polygons in GMAT Geometry Remember how I’ve mentioned like ten times about how a straight line creates a 180-degree angle? If not, well, it does. Now, think about this. What happens if we were to magically fracture that line? If we … Read More
Here’s the Solution to this Crazy-ass Problem: List T Consists of 30 Positive Decimals… Now I’m not going to lie and tell you this question is easy. It’s actually a total beast. And for that reason, I suggest that you repeat this question and repeat it again and then repeat it again until it makes … Read More