Number System Complete the series : 11, 12, 17, 18, 23, 24 ... 12 None of these 14 30 12 None of these 14 30 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP None of these
Number System If the difference between the squares of two consecutive numbers is 47, what is the smaller number ? 25 23 26 24 25 23 26 24 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 The peresent age of the father and the son are in the ratio of 8:3. After 12 years the ratio of their ages will be 2:1. What is the sum of the present age of the father and the son ? 68 years 66 years 69 years 67 years 68 years 66 years 69 years 67 years ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the present age of the father be 'x' and that of the son be 'y'. Then x/y = 8/3∴ 3x = 8y Further, x + 12/y + 12 = 2/1 ∴ x + 12 = 2y + 24 ∴ x - 2y = 12 ......(ii)From eqn (i) and (ii), x = 48, y = 18 ∴ sum = 66 yrs.
Number System 6.4 x 8.5 x 25/3.2 x 12.5 = ? 2.3 3.4 5.6 4.5 2.3 3.4 5.6 4.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 6.4 x 8.5 x 2.5/3.2 x 12.5 = 3.4
Number System The difference between 71% of a number and 46% and of the same number is 212. What is 75% of that number 845 673 724 636 845 673 724 636 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ 71% of x - 46% of x = 212∴ (71 - 46)% of x = 212∴ 25/100 x x = 212∴ x = 212 x 4 = 848∴ 75% of 848 = 848 x 75/100 = 636
Number System Sum of two numbers is 15. Two times of the first exceeds by 5 from the three times of the other. Then the numbers will be? 10, 5 7, 8 9, 6 6, 9 10, 5 7, 8 9, 6 6, 9 ANSWER DOWNLOAD EXAMIANS APP
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