Number System What is the sum of 1 + 2 + 3+ ... + 27 ? 378 382 396 343 378 382 396 343 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Sum = 27 x (27 + 1)/2= 27 x 28/2= 27 x 14= 378
Number System 124, 235, 447, 760, 1174, ? 1489 1389 1589 1689 1489 1389 1589 1689 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP +111, +212, +313, +414
Number System Which is the largest fraction among the following ? 12/13 21/22 24/25 21/23 12/13 21/22 24/25 21/23 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 21/23 = 0.913,12/13 = 0.92323/25 = 0.92, 21/22 = 0.9545, 24/25 = 0.96
Number System Sum of the digits number is 8 and their product is 12. Find the difference between the digits? 4 None 6 2 4 None 6 2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 8xy = 12(x – y)2 = (x + y)2 – 4xy (x – y)2 = 64 – 48 => (x – y) = 4
Number System If a number is subtracted from its square we get 272. Find the number? 14 22 17 24 14 22 17 24 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x2 – x = 272 => x =17
Number System Find the number, when 15 is subtracted from 7 times the number, the result is 10 more than twice of the number 4 7.5 5 15 4 7.5 5 15 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.7x -15 = 2x + 10 => 5x = 25 => x = 5
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