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 ? 660 780 840 720 660 780 840 720 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 The product of two consecutive position odd numbers is 6723. What is the smaller number? 74 71 79 83 74 71 79 83 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP n x (n + 2) = 6723= n² + 2n - 6723 = 0= n² + 83n - 81n - 6723 = 0= n(n + 83) - 81 (n + 83) = 0Therefore, (n - 81) (n + 83) = 0Therefore, n = 81, n + 2 = 83
Number System Which number should replace question mark (?) in the following equation ? ?/342 = 38/? 112 118 114 116 112 118 114 116 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 342 x 38Therefore, ? = √342 x 38 = √38 x 9 x 38 = 38 x 3 = 114
Number System Three seventh of a number is 12 more than 40% of that number. What will be the 60% of that number? 248 210 148 126 248 210 148 126 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3/7 x – 40/100 x = 12x = 35 * 1235 * 12 * 60/100 = 252/2 = 126
Number System (95.6x 910.3) ÷ 92.56256 = 9? 14.44 13.34 12.24 15.54 14.44 13.34 12.24 15.54 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 13.34
Number System 8988 / 8 / 4 = ? 561.75 4494 2247 280.875 561.75 4494 2247 280.875 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8988 * 1/8 * 1/4 = 2247/8 = 280.875
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