Number System The sum of the numbers is 264. If the first number be twice the second and third number be one-third of the first, then the second number is: 48 72 54 84 48 72 54 84 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the second number be x. Then, first number = 2x and third number = 2x/3.2x + x + 2x/3 = 26411x/3 = 264x = 72
Number System If x + y = 61 and xy = 888, What is the value of x²+ y² ? 1975 1945 1955 1965 1975 1945 1955 1965 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 √(17)² + (17)² + (5)² - 2 = ? 18 16 19 17 18 16 19 17 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √49 + 289 + 25 - 2 = √361 = 19
Number System When 102 is reduced from a number, the number gets reduced by 88%. What is that number ? 550 850 650 750 550 850 650 750 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 850
Number System Which one of the following represents the sum of the first n even numbers? N2 N(N + 1) N(N – 1) N2+ 1 N2 N(N + 1) N(N – 1) N2+ 1 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP N (N + 1)
Number System 8988 / 8 / 4 = ? 4494 561.75 280.875 2247 4494 561.75 280.875 2247 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8988 * 1/8 * 1/4 = 2247/8 = 280.875
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