Number System If (17)3 is subtracted from the square of a number, the answer so obtained is 2143. What is the number ? 83 82 81 84 83 82 81 84 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x² - (17*17*17) = 2143or x² = 2143 + 4913 = 7056∴ x = 84
Number System What should come in the place of ' ? ' in the following number series ? 2, 5, 9, 19, 37, ? 76 75 78 77 76 75 78 77 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2 x 2 + 1 = 5;5 x 2 - 1 = 99 x 2 + 1 = 19: 19 x 2 - 1 = 3737 x 2 + 1 = 75
Number System Find the average of the following set of scores 450, 1050, 12, 390, 143, 286, 550, 999 485 490 495 480 485 490 495 480 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Required average score = (450 + 1050 + 12 + 390 + 143 + 286 + 550 + 999) / 8 = 3880 / 8 = 485
Number System Supply the missing figure : 1, 4, 9, 16, 25 .... 49 36 23 16 42 36 23 16 42 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 36
Number System The sum of the digits of a two-digit number is 12, and the difference between the number and the number obtained by interchanging the two digits of the number is 18. Find the number. 12.5 75 25 50 12.5 75 25 50 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be 10x + y.∴ x + y = 12 ...........(i)10x + y - (10x + x) = 18or 10x + y - 10y - x = 18or 9x - 9y = 18∴ x - y = 2From (i) and (ii), x = 7, y = 5∴ Number = 75
Number System 124, 235, 447, 760, 1174, ? 1689 1589 1389 1489 1689 1589 1389 1489 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP +111, +212, +313, +414
EXAMIANS