Number System I. 3x2-14x + 8 = 0 II. 2y2 - 1 7 y + 36 = 0 if x >= y if x < y if x <= y if x > y if x >= y if x < y if x <= y if x > y ANSWER EXPLANATION DOWNLOAD EXAMIANS APP l. 3x2 - 12x - 2x + 8 = 0or 3x(x - 4) -2 (x -4) = 0∴ x = 4, 2/3ll. 2y2 - 8y - 9y + 36 = 0or 2y (y - 4) -9 (y - 4) = 0or (2y - 9) (y - 4) = 0∴ y = 4, 9/2
Number System Thrice the square of a natural number decreased by 4 times the number is equal to 50 more than the number. The number is: 6 4 5 10 6 4 5 10 ANSWER DOWNLOAD EXAMIANS APP
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 ? 720 780 660 840 720 780 660 840 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 Let R = qs—4. When s=8, R=16. When s=10, R is equal to 22 23 20 21 22 23 20 21 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 21
Number System Complete the series : 11, 12, 17, 18, 23, 24 ... 14 None of these 12 30 14 None of these 12 30 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP None of these
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: 80 88 40 44 80 88 40 44 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
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