Number System Complete the series : 1, 8, 27, 64, 125, 216 ..... 363 353 343 373 363 353 343 373 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 343
Number System When the square of a number is substracted from (68)², the answer so obtained is 2508. What is the number ? 45 46 47 44 45 46 47 44 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (68)² - x² = 2508Therefore, x² = 4624 = 2508Therefore, x = root of 2116 = 46
Number System The sum of two numbers is 22. Five times one number is equal to 6 times the other. The bigger of the two numbers is: 15 12 10 16 15 12 10 16 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x and (22 - x). Then,5x = 6(22 - x) 11x = 132 => x = 12So, the numbers are 12 and 10.
Number System A basket contains 5 blue, 4 green and 3 red ball. If three balls are picked at random, what is the probability that at least one is red ? 31/58 32/51 34/55 37/52 31/58 32/51 34/55 37/52 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Probability of having no red ball is9C3 / 12C3 = 21/55Probability of having at least one red ball is 1 - 21/55 = 34/55
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 3289 1760 4589 2476 3289 1760 4589 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
Number System 384×12×2=? 8465 9216 6123 7487 8465 9216 6123 7487 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 9216
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