Number System The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is: 5/4 3/5 4/5 3/10 5/4 3/5 4/5 3/10 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 36% of 850+? % of 592 = 750 12.5 25 50 75 12.5 25 50 75 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 75
Number System By how much is 3/5th of 875 greater than 2/3 of 333? 362 303 199 233 362 303 199 233 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3/5th of 875 is greater than 2/3rd of 333= 3/5 * 875 - 2/3 * 333= 525 - 222 = 303.
Number System 106 * 106 - 94 * 94 = ? 2000 1904 1906 2400 2000 1904 1906 2400 ANSWER DOWNLOAD EXAMIANS APP
Number System If the product of two successive positive integers is 4692, what is the smaller number ? 64 70 66 68 64 70 66 68 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ∵ 68 x 69 = 4692
Number System If (74)² is added to the square of a number the answer so obtained is 7780. What is the number ? 50 49 48 47 50 49 48 47 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.or, x² + (74)² = 7780or, x² = 7780 - 5476 = 2304∴ x = 48
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