Number System If a + b = 16 and ab = 68, what is the value of a² + b² ? 112 120 124 116 112 120 124 116 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP a + b = 16 Therefore, (a+b)² = (16)² = 256 a² + b² + 2ab = 256Therefore, a² + b² = 256 - 2 x 68Therefore, a² + b² = 256 - 136 = 120
Number System If the fractions8/5,7/2,9/5,5/4,4/5 are arranged in descending order of their values, which one will be fourth? 7/9 5/4 11/13 1/3 7/9 5/4 11/13 1/3 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 5/4
Number System If (182)² is added to the square of a number, the answer so obtained is 47765. What is the number ? 131 121 101 111 131 121 101 111 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 If 5/7 of a number is 145, what is 180% of that number ? 375.4 365.4 355.4 345.4 375.4 365.4 355.4 345.4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x x 5/7 = 145∴ x = 145 x 7/5 = 203Now, 203 x 180/100 = 365.4
Number System 486+32×25—59=? 567 596 528 582 567 596 528 582 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 528
Number System Complete the series : 81, 69, 58, 48, 39 ........ 30 31 28 29 30 31 28 29 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 31