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 ? 840 660 720 780 840 660 720 780 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 What is the average of the following set of numbers ? 173, 192, 198, 204, 211, 223, 227 222 210 204 234 222 210 204 234 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Avg = 173 + 192 + 198 + 204 + 211 + 223 + 227/7 = 1428/7 = 204
Number System Find the average of the following set of scores 450, 1050, 12, 390, 143, 286, 550, 999 495 490 480 485 495 490 480 485 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Required average score = (450 + 1050 + 12 + 390 + 143 + 286 + 550 + 999) / 8 = 3880 / 8 = 485
Number System The simplest form of 1.5 : 2.5 is : 17 : 19 13 : 11 5 : 7 3 : 5 17 : 19 13 : 11 5 : 7 3 : 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3 : 5
Number System Pick the wrong number from the given number series. 3,4,10,33,135,685,4116 135 10 685 33 135 10 685 33 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The correct number is 136.3 x 1 + 1 = 44 x 2 + 2 = 1010 x 3 + 3 = 3333 x 4 + 4 = 136136 x 5 + 5 = 685685 x 6 + 6 = 4116
Number System Which one of the following represents the sum of the first n even numbers? N2+ 1 N(N – 1) N2 N(N + 1) N2+ 1 N(N – 1) N2 N(N + 1) ANSWER EXPLANATION DOWNLOAD EXAMIANS APP N (N + 1)
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