Number System The difference between a number and its three-fifth is 50. What is the number? 100 125 75 None of these 100 125 75 None of these ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x - 3/5 x = 50 => 2/5 x = 50x = (50 * 5)/2 = 125.
Number System {(742)² ÷ 36} ÷ 2 = ? 421.5 420.5 422.5 423.5 421.5 420.5 422.5 423.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (174 x 174/36) ÷ 2 = 841/2 = 420.5
Number System If x + y = 61 and xy = 888, What is the value of x²+ y² ? 1955 1975 1965 1945 1955 1975 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 √360 - 225 x 2 + 379 = ? 17 19 18 20 17 19 18 20 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √360 - 225 x 2 + 379 = √360 - 450 + 379 = √289= 17
Number System If 1.5 x= 0.04 y, then the value of (y-x) (y+x) is: 73/77 83/77 93/77 77/73 73/77 83/77 93/77 77/73 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 73/77
Number System (444 x 44 x 4) ÷ 40 ? 2153.6 1953.6 2053.6 1853.6 2153.6 1953.6 2053.6 1853.6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 444 x 44 x 4/40 = 1953.6
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