Number System If x + y = 61 and xy = 888, What is the value of x²+ y² ? 1975 1955 1965 1945 1975 1955 1965 1945 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Because (x + y)² = x² + y² + 2xy∴ x² + y² = (x + y)² - 2xy∴ x² + y² = (61)² - 2 x 888= 3721 - 1776 = 1945
Number System What should come in place of question mark (?)? 8 : 1 1 : : 72: 109 79 99 89 109 79 99 89 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let ? = xTherefore 8 : 11 : 72 : xTherefore x = (11 x 72) / 8 = 99
Number System If the fractions 1/7, 3/5, 2/5, 5/6 and 9/11 are arranged in descending order of their values, which one will be the fourth number? 1/5 3/5 4/5 2/5 1/5 3/5 4/5 2/5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1/4 = 14. 3/5 = 6.2/5 = 4.5/6 = 83.9/11 = 82.Therefore, 83 > 82 > 6 > 14
Number System 6.4 x 8.5 x 25/3.2 x 12.5 = ? 2.3 3.4 4.5 5.6 2.3 3.4 4.5 5.6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 6.4 x 8.5 x 2.5/3.2 x 12.5 = 3.4
Number System If 4 2/3 is subtracted form 10 1/2 and the difference is multiplied by 450, then what is the final answer? None of these 2675 2875 2725 None of these 2675 2875 2725 ANSWER DOWNLOAD EXAMIANS APP
Number System {3√4913}² = ? 289 121 225 333 289 121 225 333 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (3√4913)² = (17)² = 289
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