Number System What is the sum of 1 + 2 + 3+ ... + 27 ? 396 343 378 382 396 343 378 382 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Sum = 27 x (27 + 1)/2= 27 x 28/2= 27 x 14= 378
Number System 7589 - ? = 3434 11023 1123 4242 4155 11023 1123 4242 4155 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let 7589 - x = 3434Then x = 7589 - 3434 = 4155
Number System Three numbers which are co-prime to one another are such that the product of the first two 551 and that of the last two is 1073. The sum of the three numbers is 85 93 74 110 85 93 74 110 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 85
Number System Sum of the digits number is 8 and their product is 12. Find the difference between the digits? None 6 4 2 None 6 4 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 When 102 is reduced from a number, the number gets reduced by 88%. What is that number ? 850 650 550 750 850 650 550 750 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 850
Number System √360 - 225 x 2 + 379 = ? 19 17 18 20 19 17 18 20 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √360 - 225 x 2 + 379 = √360 - 450 + 379 = √289= 17
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