Number System What is the least number, which is perfect square but contains 2700 as its factor? 5400 10800 2700 1800 5400 10800 2700 1800 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 900 * 3 * 3 = 8100
Number System If the sum of the two numbers is 22 and the sum of their squares is 404, then the product of the numbers is: 40 44 80 88 40 44 80 88 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x and y. Then, (x + y) = 22 and x2 + y2 = 404 Now, 2xy = (x + y)2 - (x2 + y2) 2xy= 222 - 404 = 484 - 404 = 80xy = 40
Number System 217 * 217 + 183 * 183 = ? 80578 80698 79698 81268 80578 80698 79698 81268 ANSWER DOWNLOAD EXAMIANS APP
Number System In how many different ways can be the letters of the word PENCIL be arranged among themselves ? 720 640 510 860 720 640 510 860 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Total six letters are there and hence the number of arrangements = 6! = 6 x 5 x 4 x 3 x 2 x 1 = 720
Number System If the sum of five consecutive even numbers A, B, C, D and E is 130, what is the product of A and E ? 840 780 720 660 840 780 720 660 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the consecutive even numbers be A = 2x, B = 2x + 2, C = 2x + 4, D = 2x + 6 and E = 2x + 8= A + B + C + D + E = 130= 10x + 20 = 130∴ x = 130 - 20/10 = 11Therefore, product of A and E= 22 x 30 = 660
Number System In an examination, 68% of the total examinees passed. If the number of failures is 248, the total number of examinees is 725 750 775 640 725 750 775 640 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Failed students are 32% which is 248.∴ Total = 24800/32 = 775
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