Number System (3² x 4² x 5) ÷ 36 = (?)² - 80 12 10 14 16 12 10 14 16 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 3² x 4² x 5/36 + 80= 20 + 80 = 100∴ ? = √100 = 10
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 ? 720 660 780 840 720 660 780 840 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 If (182)² is added to the square of a number, the answer so obtained is 47765. What is the number ? 101 121 131 111 101 121 131 111 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be xTherefore x² + (182)² = 47765Therefore x² = 47765 - (182)2 = 47765 - 33124Therefore x² = 14641, Therefore x = 121
Number System (12)² - (4.4)² - (0.04)² = ? 131.6384 125.6384 129.6384 124.6384 131.6384 125.6384 129.6384 124.6384 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (12)² - (4.4)² - (0.04)²= 144 - 19.36 - 0.0016= 124.64 - 0.0016= 124.6384
Number System 2536+4851—?=3450+313 6784 3624 5243 4567 6784 3624 5243 4567 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3624
Number System The sum of five consecutive numbers is 190. What is the sum of the largest and the smallest number ? 74 75 73 76 74 75 73 76 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + x + 1 + x + 2 + x + 3 + x + 4= 190= 5x + 10 = 190= 5x = 190 - 10 = 180= x = 180/5 = 36The largest number = 36 + 4 = 40∴ Required sum = 36 + 40 = 76
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