GMAT - Math exam 2024 with 100% correct answers

What is the volume of a cube? correct answersThe volume of a cube is the cube of the length of its sides If a cube has a total surface area of 96, what is its volume? correct answers64 A cube has six sides, so if the total surface area is 96, then the surface area of a square side is 96/6=16. The area of a square is the square of the length of its sides, so the length of a side is the square root of 16=4. The volume of a cube is the cube of the length of its sides, so 4^3=64 Chris's convertible gets gas mileage that is 40 percent higher than that of Stan's SUV. If Harry's hatchback gets gas mileage that is 15 percent higher than that of Chris's convertible, then Harry's hatchback gets gas mileage that is what percent greater than that of Stan's SUV? correct answers61% Plugging problem. Since it's a percent problem, too, and the question asks us to find a percentage greater than the mileage of Stan's SUV, let's make Stan's mileage 100. Chris's mileage is therefore 140; 15% of 140 is 21, so Harry's mileage is 161. 161 is 61% greater than 100, and the correct answer is D. Suppose that over the next 10 years, for every 100 female children born the number of male births reaches 160. If all of the information in the three sources is accurate, the number of male births for every female birth would be closest to __________ a. 1 b.2 c.7 d.10 e.16 correct answersThe correct answer is 2. If there are 160 male births for every 100 female births, then for every 10 females born, 16 males would be born. Reducing the ratio further, for every 1 female born, 1.6 males would be born. This number is rounded up to 2 males for each female. The hold of a fishing boat contains only cod, haddock, and halibut. If a fish is selected at random from the hold, what is the probability that it will be a halibut or a haddock?