Number System (1024—263—233)÷(986—764— 156) =? 8 None of these 6 10 8 None of these 6 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8
Number System The difference between a number and its three-fifth is 50. What is the number? 100 None of these 125 75 100 None of these 125 75 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x - 3/5 x = 50 => 2/5 x = 50x = (50 * 5)/2 = 125.
Number System If (74)² is added to the square of a number the answer so obtained is 7780. What is the number ? 49 48 47 50 49 48 47 50 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.or, x² + (74)² = 7780or, x² = 7780 - 5476 = 2304∴ x = 48
Number System If x + y = 61 and xy = 888, What is the value of x²+ y² ? 1965 1975 1955 1945 1965 1975 1955 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 96% of a number is 19584. What is 56% of that number ? 11324 11424 11524 11224 11324 11424 11524 11224 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.According to the question.96% of x = 19584= x = 1958 x 100/96 = 20400∴ 56% of 20400= 20400 x 56/100= 11424
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