Number System 7589 - ? = 3434 4155 4242 1123 11023 4155 4242 1123 11023 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let 7589 - x = 3434Then x = 7589 - 3434 = 4155
Number System When 102 is reduced from a number, the number gets reduced by 88%. What is that number ? 850 550 750 650 850 550 750 650 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 850
Number System If x + y = 61 and xy = 888, What is the value of x²+ y² ? 1945 1955 1975 1965 1945 1955 1975 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 If the sum and difference of two numbers are 20 and 8 respectively, then the difference of their square is: 160 180 28 12 160 180 28 12 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x and y. Then, x + y = 20 and x - y = 8x2 - y2 = (x + y)(x - y) = 20 * 8 = 160.
Number System 17580 x 1.8 - 13720 x 2.1 = ? x 2.4 1180 1160 1140 1120 1180 1160 1140 1120 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2.4 x ? = 31644 - 28812 = 2832∴ ? = 2832/2.4= 1180
Number System Two third of three- fifth of one fourth of a number is 24, what is 30% of that number? 42 72 90 69 42 72 90 69 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x * 2/3 * 3/5 * 1/4 = 24x = 240240 * 30/100 = 72
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