Number System What is the value of ? in the following equations ? 72/? = ?/50 80 100 40 60 80 100 40 60 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 72 x 50= (6 x 6 x 2) x (5 x 5 x 2)= (6 x 5 x 2)² = (60)²∴ ? = 60
Number System If the difference between the squares of two consecutive numbers is 47, what is the smaller number ? 23 24 26 25 23 24 26 25 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be (x + 1) and x.Therefore, (x + 1)² - x² = 47x² + 2x + 1 - x² = 472x + 1 = 47Therefore, x = 46/2 = 23
Number System A certain number of two digits is three times the sum of its digits. If 45 be added to it, the digits are reversed. The number is: 30 24 27 22 30 24 27 22 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 27
Number System Thrice the square of a natural number decreased by 4 times the number is equal to 50 more than the number. The number is: 6 4 5 10 6 4 5 10 ANSWER DOWNLOAD EXAMIANS APP
Number System What should come in place of the question mark (?) in the given number series ? 888, 888, 444, 148, ?, 7.4 36 37 39 38 36 37 39 38 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 What should come in place of (?) in the following series ? 10, 19, 30, 43, 58, ? 78 76 77 75 78 76 77 75 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The series is: +9, +11, +13, +15, +17
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