Amazon Aptitude Questions with Solutions
Amazon Aptitude Questions with Solutions 1: The difference between 4/17 of 17/19 of a number and 3/38 of the same number is 17.5. Find the number. a)17. 5 b) 18.5 c) 20 d) 133 Answer: (d) Explanation: Let the number be X. Then, 4/17 of 17/19 of the number is (4/17) * (17/19) * X = (4/19) * X 3/38 of the number= (3/38) * X Given: the difference between these two values is 17.5. Hence, [(4/19) * X - (3/38) * X ]= 17.5 Solving the equation, we have X=133 Therefore, the number is 133. 2: a, b, c, and d are four numbers in arithmetic progression. Mean of these four numbers is 20. The common difference between the numbers is 6. Find the product of first and the last numbers. a) 13 b) 34 c) 319 d) 124 Answer: (c) Explanation: Let the four numbers be a, a+b, a+2b, and a+3b Mean of the four numbers = (a+a+b+a+2b+a+3b)/4 = (4a+6b)/4 = 20 Substituting b as 6, we get the value of a= 11 The product of the first and the last number is 11× 29 whi