Number System The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference of the two digits of the number ? 2 1 4 3 2 1 4 3 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (10x + y) - (10y + x) = 36,9(x - y) = 36/9 = 4
Number System A number when multiplied by five times of itself give the value equal to 1445. What is the number ? 15 18 16 17 15 18 16 17 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x x 5x = 1445= 5x² = 1445= x² = 289∴ x = 17
Number System When 732 is subtracted form the square of a number, the answer that is obtained is 5280. What is the number? 99 101 103 97 99 101 103 97 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x2 - 732 = 5280 x2 = 5280 + (70+3)2 = 5280 + 4900 + 420 + 9 = 10609= 10000 + 2(100)(3) + 32 = (100 + 3)2x = 100 + 3 = 103.
Number System In how many different ways can the letters of the word FORMULATE be arranged ? 392880 362880 382880 372880 392880 362880 382880 372880 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP No. of letters = 9! = 9*8*7*6*5*4*3*2*1 = 362880
Number System The difference between two integers is 5. Their product is 500. Find the numbers. 15, 20 21, 26 30, 25 20, 25 15, 20 21, 26 30, 25 20, 25 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the integers be x and (x + 5). Then, x(x + 5) = 500 x2 + 5x - 500 = 0 (x + 25)(x - 20) = 0 x = 20So, the numbers are 20 and 25.
Number System Find the smallest number which should be multiplied with 520 to make it a perfect square. 120 30 None of these 55 120 30 None of these 55 ANSWER DOWNLOAD EXAMIANS APP
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