Number System How many figures are required to number the pages the pages of a book containing 365 pages? 977 897 967 987 977 897 967 987 ANSWER DOWNLOAD EXAMIANS APP
Number System 106 * 106 - 94 * 94 = ? 1904 2400 1906 2000 1904 2400 1906 2000 ANSWER DOWNLOAD EXAMIANS APP
Number System Two numbers are in the ratio 3:5. If 9 be subtracted from each, they are in the ratio of 9:17. The first number is: 30 36 18 27 30 36 18 27 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (3x-9):(5x-9) = 9:17 x = 12 => 3x = 36
Number System 84 * 29 + 365 = ? - 2071 2801 2436 - 2801 - 2071 2801 2436 - 2801 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP - 84 * (30 - 1) + 365= - (84 * 30) + 84 + 365= - 2520 + 449 = - 2071
Number System The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is: 4/5 5/4 3/10 3/5 4/5 5/4 3/10 3/5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1/x - x = 9/20 20x2 + 9x - 20 = 0 20x2 + 25x - 16x - 20 = 0 5x(4x + 5) -4(4x + 5) = 0(4x + 5)(5x - 4) = 0x = 4/5
Number System If A + B = 30 and AB = 94, What is the value of A² + B² ? 920 712 625 824 920 712 625 824 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (A + B)² = (30)² = 900A² + B² + 2AB = 900Therefore, A² + B² = 900 - 2 x 94 = 900 - 188 = 712
EXAMIANS