Number System If the difference between the squares of two consecutive numbers is 47, what is the smaller number ? 25 24 26 23 25 24 26 23 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be (x + 1) and x.Therefore, (x + 1)² - x² = 47x² + 2x + 1 - x² = 472x + 1 = 47Therefore, x = 46/2 = 23
Number System (1024—263—233)÷(986—764— 156) =? 6 10 8 None of these 6 10 8 None of these ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8
Number System By how much is 3/5th of 875 greater than 2/3 of 333? 233 362 199 303 233 362 199 303 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 What is the missing number in this series? 8 2 14 6 11 ? 14 6 18 12 9 7 3 2 9 7 3 2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 9
Number System On dividing number by 56, we get 29 as remainder. On dividing the same number by 8, what will be the remainder? 7 6 4 5 7 6 4 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let x be the number and y be the quotient. Then, x = 357 * y + 39= (17 * 21 * y) + (17 * 2) + 5= 17 * (21y + 2) + 5.Required remainder = 5.
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 ? 30/146 27/143 29/145 28/144 30/146 27/143 29/145 28/144 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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