Number System What should come in the place of ' ? ' in the following number series ? 2, 5, 9, 19, 37, ? 77 75 76 78 77 75 76 78 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2 x 2 + 1 = 5;5 x 2 - 1 = 99 x 2 + 1 = 19: 19 x 2 - 1 = 3737 x 2 + 1 = 75
Number System 35%of ?=242 394 487 693 542 394 487 693 542 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 693
Number System In how many different ways can the letters of the word ANATOMY be arranged ? 2508 2504 2520 2510 2508 2504 2520 2510 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Here total letters are 7 but A comes twice.Therefore, Numbers of arrangements = 7!/2! = 2520
Number System The number of prime factors of (6)10×(7)17×(55)27 91 41 101 61 91 41 101 61 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 91
Number System A number when multiplied by five times of itself give the value equal to 1445. What is the number ? 16 15 17 18 16 15 17 18 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x x 5x = 1445= 5x² = 1445= x² = 289∴ x = 17
Number System The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is: 3/10 5/4 3/5 4/5 3/10 5/4 3/5 4/5 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
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