Number System Which choice provides the answer : If 2 + 3 = 10, 6 + 5 = 66, 7 + 2 = 63, 9 + 7 = 144 then, 8 + 4 = ? 102 96 88 114 102 96 88 114 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 96
Number System If the difference between the squares of two consecutive numbers is 47, what is the smaller number ? 26 24 25 23 26 24 25 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 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 ? 27/143 29/145 30/146 28/144 27/143 29/145 30/146 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
Number System On converting the following base-2 numeral in base ten, 1101101, we get 107 106 109 108 107 106 109 108 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 109
Number System How many figures are required to number the pages the pages of a book containing 365 pages? 967 897 987 977 967 897 987 977 ANSWER DOWNLOAD EXAMIANS APP
Number System The product of two successive numbers is 4556. Which of the following is the larger of the two numbers? 68 78 67 63 68 78 67 63 ANSWER DOWNLOAD EXAMIANS APP
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