Number System 4500 * ? = 3375 3/5 3/4 1/4 2/5 3/5 3/4 1/4 2/5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4500 * x = 3375= x = 3375/4500 = 3/4
Number System What should come in place of the question mark (?) in the given number series ? 888, 888, 444, 148, ?, 7.4 39 37 38 36 39 37 38 36 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let x be the missing number.Then888/888 = 1,888/444 = 2,444/148 = 3,148/x = 4= x = 148/4 = 37 and 37/7.4 = 5
Number System If (17)3 is subtracted from the square of a number, the answer so obtained is 2143. What is the number ? 82 83 84 81 82 83 84 81 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x² - (17*17*17) = 2143or x² = 2143 + 4913 = 7056∴ x = 84
Number System If the fractions 1/7, 3/5, 2/5, 5/6 and 9/11 are arranged in descending order of their values, which one will be the fourth number? 1/5 2/5 4/5 3/5 1/5 2/5 4/5 3/5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1/4 = 14. 3/5 = 6.2/5 = 4.5/6 = 83.9/11 = 82.Therefore, 83 > 82 > 6 > 14
Number System The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is: 289 289/290 1/289 290/289 289 289/290 1/289 290/289 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 In how many different ways can the letters of the word ANATOMY be arranged ? 2504 2520 2508 2510 2504 2520 2508 2510 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Here total letters are 7 but A comes twice.Therefore, Numbers of arrangements = 7!/2! = 2520
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