Number System (3² x 4² x 5) ÷ 36 = (?)² - 80 14 16 12 10 14 16 12 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 3² x 4² x 5/36 + 80= 20 + 80 = 100∴ ? = √100 = 10
Number System The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is: 290/289 289/290 1/289 289 290/289 289/290 1/289 289 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be a and b. Then,ab = 17, a = 1 and b = 17So, 1/a2 + 1/b2 = (a2 + b2)/a2 b2 = (12 + 172)/(1 * 17)2 = 290/289
Number System Sum of two consecutive even terms lacks by 98 from their product. Find the sum of these number 24 32 None 18 24 32 None 18 ANSWER DOWNLOAD EXAMIANS APP
Number System 480% of 350 + 620% of 275 = ? 2385 3385 4385 5385 2385 3385 4385 5385 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 480 x 350/100 + 620 x 275/100= 1680 + 1705 = 3385
Number System What is the difference between the largest number and the least number written with the digits 7, 3, 1, 4? 6084 6048 5084 6184 6084 6048 5084 6184 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 ? 720 840 780 660 720 840 780 660 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
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