tailieunhanh - Quantitative comparisons practice phần 6

Tham khảo tài liệu 'quantitative comparisons practice phần 6', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | The ratio in column B is greater than the ratio in column A since the ratio in column B is greater than 1. 45. A The original ratio B The new ratio AI In the aviation camp the ratio between the number of cadets to the number of instructors is 6 3. One cadet and two instructors joined the camp. The best answer is C. The people who joined the camp are according to the ratio. If at first it was 3 6 or 1 2 now its 3 1 6 2 1 2 and therefore the ratio didn t change and the columns are equal. 46. A 1 1 B The new ratio AI The ratio between the number of boys to the number of girls in the pool is 3 7. Seven boys and three girls joined the pool. The best answer is D. At first the 3 referred to the boys and 7 to the girls. The new kids that came to the pool came also in a ratio of 3 7 but in favor of the boys this time and thus we cannot compare between the ratios. Its also easy to look at it in a different way there could have been 30 boys and 70 girls and so if kids joined the pool not in this ratio it would have been impossible to find the new ratio. 47. A The distance ratio between Mike and Spike B The distance ratio between Slay and Mike AI Slay Spike and Mike are having a skateboard race. The ratio between their speeds is 6 3 2 respectively. The ratio between their traveling time is 4 6 12 respectively. The best answer is A. The ratio between their distances is actually the ratio between their times multiplied by their ratio of speeds. The ratio of distances is 24 18 24 or 4 3 4. And therefore the ratio in column A 4 3 and the ratio in column B 1. 4 3 1 and therefore column A is greater. Digits and letters 48. A X B Y AI X Y and Z are different digits. Y Z XX. The best answer is B. AA is a double digit number and since its made out a sum of two digits - A 1. Y can t be zero because then Z would have to be larger than 9 and it cant be 1 because all the digits are different. The conclusion is that Y must be greater than 1 and so column B is greater. 49. A B B 7 AI A B and