Number System If x + y = 61 and xy = 888, What is the value of x²+ y² ? 1945 1965 1975 1955 1945 1965 1975 1955 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 The sum of the digits of a two digit number is 12. If the new number formed by reversing the digits is greater than the original number by 54, then what will be the original number? 59 39 69 49 59 39 69 49 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 39
Number System Simplify the 121 * 175 + 363 * 275 316600 None of these 328100 363000 316600 None of these 328100 363000 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 121 * 175 + 363 * 275 => 121 * 175 + 121 * 3 * 275121 * 175 + 121 * 825= 121 * (175 + 825) = 121000
Number System 3√103823 = ? 44 47 41 52 44 47 41 52 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 3√103823 = 3√47 x 47 x 47 = 47
Number System 1089/? = ?/1296 1278 1348 1188 1082 1278 1348 1188 1082 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 1089 x 1296(?)²= (11 x 11 x 9) x (12 x 12 x 9)(?)= 11 x 12 x 9= 1188
Number System The population of a town increases by 15% in the first year and decreases by 25% in the second year. If its current population is 168480 then what will be its population after two years ? 145214 145914 145314 145714 145214 145914 145314 145714 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Population of the town= 168480 x 115/100 x 75/100= 145314
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