Number System 106 * 106 - 94 * 94 = ? 1904 2000 1906 2400 1904 2000 1906 2400 ANSWER DOWNLOAD EXAMIANS APP
Number System If a + b = 16 and ab = 68, what is the value of a² + b² ? 116 120 112 124 116 120 112 124 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 Which number should replace question mark (?) in the following equation ? ?/342 = 38/? 114 116 118 112 114 116 118 112 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 342 x 38Therefore, ? = √342 x 38 = √38 x 9 x 38 = 38 x 3 = 114
Number System The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is: 289/290 1/289 290/289 289 289/290 1/289 290/289 289 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 Twenty times a positive integer is less than its square by 96. What is the integer? Cannot be determined 20 30 24 Cannot be determined 20 30 24 ANSWER DOWNLOAD EXAMIANS APP
Number System Which one of the following is the sum of the numbers 1, 3, 5, 7, 9…. up to nth number? N2 + 1 N2 N(N + 1)/2 N(N + 1) N2 + 1 N2 N(N + 1)/2 N(N + 1) ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS