Number System The sum of the numbers is 264. If the first number be twice the second and third number be one-third of the first, then the second number is: 72 84 48 54 72 84 48 54 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the second number be x. Then, first number = 2x and third number = 2x/3.2x + x + 2x/3 = 26411x/3 = 264x = 72
Number System If (182)² is added to the square of a number, the answer so obtained is 47765. What is the number ? 111 121 101 131 111 121 101 131 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be xTherefore x² + (182)² = 47765Therefore x² = 47765 - (182)2 = 47765 - 33124Therefore x² = 14641, Therefore x = 121
Number System How many numbers up to 300 and 700 are divisible by 2, 3 and 7 both together? 10 11 8 9 10 11 8 9 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (700 – 300)/42 = 9 22/42 => 9 Numbers
Number System An urn contains 9 blue, 7 white and 4 black balls. If 2 balls are drawn at random, then what is the probability that only one ball is white ? 92/190 91/190 89/190 90/190 92/190 91/190 89/190 90/190 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Total possible outcomes = 20C2 = 20 x 19/1 x 2 = 190Total favourable outcomes = 7C1 x 13C1 = 7 x 13 = 91∴ Required probability = 91/190
Number System (95.6x 910.3) ÷ 92.56256 = 9? 15.54 13.34 12.24 14.44 15.54 13.34 12.24 14.44 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 13.34
Number System {3√4913}² = ? 121 289 333 225 121 289 333 225 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (3√4913)² = (17)² = 289
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