Tham khảo tài liệu 'quantitative comparisons practice phần 2', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | AI X X2 The best answer is A. Since X X2 X is a positive number and so divide each wing by X to get X 1. Pick a number for X for example X Í4 and plug it in. A 4 and B 1 and therefore column A is greater. 18. A W - Z B X - Y AI X W Z Y The best answer is A. Move variables from one column to the other A Y - Z which is positive and B X - W which is negative and therefore column A is greater. 19. A 0 B Z AI X Y YZ XZ The best answer is A. If X Y then Z must have changed the sign in the inequality YZ XZ and so Z must be negative. 20. A X4 B X5 AI X X y -X The best answer is A. In the extra information since a positive number is multiplying X and the result is smaller than -X itself X must be negative. Since X is negative X4 results in a positive number and therefore column A is greater. 21. A 5X 3 B 5x56 AI 2 X 3 The best answer is B. Pick up a number for X for example X . A x 3 . B 6 which is greater than column A. 22. A X Y - X B XY AI X 0 The best answer is B. Subtract XY from both sides to get A -X2 B 0 and since X cannot be zero A is a negative number which is smaller than B. A D C A The measurement of the angle DAC B The measurement of the angle DBC The best answer is B. The angle DBC is an outer angle to the triangle DBA and therefore it s equal to the sum of the two inner angles which are not adjacent to it. If DBC DAC BDA then DBC DAC. B 24 The best answer is A. The third angle in the triangle is 180 - 32 - 68 80 degrees. The side 8 is in front of the angle 32 which is the smallest one in the triangle and therefore the other sides must be greater than 8 and so their sum must be greater than 24 8 x 3 . 3. P X A X 2 - 9R Q B Y AI The triangle is an isosceles X and Y are outer and internal angles respectively The best answer is C. We need to find a connection between X and Y. Since the triangle is an isosceles its angles are Y Y and 180 - 2Y. Focus on the upper corner of the triangle the sum of the angles around it should be 360 degrees and
