Number System 3√103823 = ? 52 47 44 41 52 47 44 41 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 3√103823 = 3√47 x 47 x 47 = 47
Number System √360 - 225 x 2 + 379 = ? 20 18 17 19 20 18 17 19 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √360 - 225 x 2 + 379 = √360 - 450 + 379 = √289= 17
Number System If the average of two numbers is 88.5 and one number is 5.5 less than the average. Find out the next number. 86 91 94 97 86 91 94 97 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 94
Number System If the difference between a number and its three-fourth is 18, find the number. 57 72 61 68 57 72 61 68 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.According to the question,x - 3x/4 = 18= x/4 = 18= x = 4 x 18 = 72
Number System What value should come in place of ? in the given number series ? 15, 51, 162, 498, 1509, ? 7878 5656 4545 3434 7878 5656 4545 3434 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 15, (15 + 2) x 3 = 51,(51 + 3) x 3 = 162, (162 + 4) x 3 = 498, (498 + 5) x 3 = 1509(1509 + 6) x 3 = 4545
Number System A box contains 5 red, 4 black and 4 blue balls. If 3 balls are drawn randomly from the box, what is the probability that there are exactly 2 blue balls in the three drawn balls ? 28/144 29/145 30/146 27/143 28/144 29/145 30/146 27/143 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Total balls = 5 + 4 + 4 = 13∴ n(S) = 13C3 = 2862 blue balls can be selected from 4 balls in 4C2 = 6 ways and the remaining one ball is to be selected from 9 balls in 9C1 = 9 ways ∴ n(E) = 6 x 9∴ P(E) = 6 x 9/286 = 27/143
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