Number System 4.78% of 1255 + 3.24% of 440=0.5% of ? 14849 11849 13849 12849 14849 11849 13849 12849 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 0.5 x ?/100 = 4.78 x 1255/100 + 3.24 x 440/100= 59.989 + 14.256∴ ? = 74.245 x 100/0.5 = 14849
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 What should come in place of question mark (?)? 8 : 1 1 : : 72: 109 79 89 99 109 79 89 99 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let ? = xTherefore 8 : 11 : 72 : xTherefore x = (11 x 72) / 8 = 99
Number System The difference between the two digit number and the number obtained by interchanging its digits is 54. The difference between the digits is? 6 Nothing can be said. 4 1 6 Nothing can be said. 4 1 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (10x + y) – (10y + x) = 54x – y = 6
Number System By how much is 3/5th of 875 greater than 2/3 of 333? 362 303 199 233 362 303 199 233 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3/5th of 875 is greater than 2/3rd of 333= 3/5 * 875 - 2/3 * 333= 525 - 222 = 303.
Number System The average of five consecutive even numbers A, B, C, D and E is 42. What is the product of B and D ? 2476 4589 1760 3289 2476 4589 1760 3289 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP A + B + C + D + E/5 = 42∴ C = 42, ∴ B = 40, ∴ D = 44∴ B x D = 40 x 44 = 1760
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