Number System A number when multiplied by five times of itself give the value equal to 1445. What is the number ? 17 18 15 16 17 18 15 16 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x x 5x = 1445= 5x² = 1445= x² = 289∴ x = 17
Number System If a number is multiplied by. three-fourth of itself, the value thus obtained is 10800. What is that number ? 260 120 60 180 260 120 60 180 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x x 3x/4 = 10800= x² = 10800 x 4/3 = 14400∴ x = √14400 = 120
Number System In how many different ways can the letters of the word ANATOMY be arranged ? 2504 2508 2520 2510 2504 2508 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 sum of three consecutive multiples of 3 is 72. What is the largest number? 21 27 36 24 21 27 36 24 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be 3x, 3x + 3 and 3x + 6.Then,3x + (3x + 3) + (3x + 6) = 729x = 63x = 7Largest number = 3x + 6 = 27.
Number System Given √2 = 1.414, the value of √8 + 2√32 - 3√128 + 4√50 is 8.784 8.684 8.484 8.584 8.784 8.684 8.484 8.584 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8.484
Number System The difference between a two-digit number and the number obtained by interchanging its two digits is 45. The sum of the digit of the number is 9. What is the product of the two digits of the number? 12 14 15 13 12 14 15 13 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be 10x + y.Therefore, x + y = 9 ..................(i)10x + y - (10y + x) = 4510x + y - 10y - x = 45Therefore, x - y = 5 ..................(ii)From (i) and (ii), x = 7, y = 2Number = 72Therefore, = x x y = 7 x 2 = 14
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