Number System 1827÷ 36 x ?=162.4 2.6 3.2 4.3 1.9 2.6 3.2 4.3 1.9 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3.2
Number System When 732 is subtracted form the square of a number, the answer that is obtained is 5280. What is the number? 99 101 97 103 99 101 97 103 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x2 - 732 = 5280 x2 = 5280 + (70+3)2 = 5280 + 4900 + 420 + 9 = 10609= 10000 + 2(100)(3) + 32 = (100 + 3)2x = 100 + 3 = 103.
Number System What should come in place of question mark (?)? 8 : 1 1 : : 72: 89 79 109 99 89 79 109 99 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let ? = xTherefore 8 : 11 : 72 : xTherefore x = (11 x 72) / 8 = 99
Number System If the difference between a number and two-fifths of that number is 45 what is the number ? 77 75 76 78 77 75 76 78 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x ∴ x - 2x/5 = 45∴ x = 75
Number System If x + y = 61 and xy = 888, What is the value of x²+ y² ? 1955 1975 1945 1965 1955 1975 1945 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 (4.6 x 2.8 x 5.5) - (3.2 x 4.5 x 2.8) = ? 28.56 27.54 30.52 29.81 28.56 27.54 30.52 29.81 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (4.6 x 2.8 x 5.5) - (3.2 x 4.5 x 2.8) = 70.84 - 40.32 = 30.52
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