Number System If (35)² is added to the square of a number the answer so obtained is 1394. What is the number ? 17 15 11 13 17 15 11 13 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x Therefore, x² + (35)² = 1394Therefore, x² = 1394 - (35)² = 1394 - 1225 = 169Therefore, x = √169 = 13
Number System Which one of the following represents the sum of the first n even numbers? N(N + 1) N2+ 1 N(N – 1) N2 N(N + 1) N2+ 1 N(N – 1) N2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP N (N + 1)
Number System √207.36 = ? 15.7 12.3 16.7 14.4 15.7 12.3 16.7 14.4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP √207.36 = √20736/√100 = 144/10 = 14.4
Number System What is the sum of all the numbers between 300 and 1000 which are divisible by 179? 2607 2517 2527 2506 2607 2517 2527 2506 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 358/179 ….. 895/179179(2 + 3 + 4 + 5) => 2506
Number System If a + b = 16 and ab = 68, what is the value of a² + b² ? 112 124 116 120 112 124 116 120 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 1051.64 - 159.42 - 96.84 + 162.37 - 940.26 + 504 = ? 491.49 511.49 521.49 501.49 491.49 511.49 521.49 501.49 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 1718.01 - 1196.52 = 521.49
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