Number System The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is: None of these 20 40 30 None of these 20 40 30 ANSWER DOWNLOAD EXAMIANS APP
Number System The number of prime factors of (6)10×(7)17×(55)27 61 101 41 91 61 101 41 91 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 91
Number System One-eighth of a number is 76. What will be 54% of the number ? 332.32 318.32 321.32 328.32 332.32 318.32 321.32 328.32 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x Therefore, 1/8 of x = 76Therefore, x = 60854% of 608 = 608 x 54/100 = 328.32
Number System A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is that number? None of these 3.5 8 6 None of these 3.5 8 6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,3(2x + 9) = 752x = 16 => x = 8
Number System If A + B = 30 and AB = 94, What is the value of A² + B² ? 712 920 625 824 712 920 625 824 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (A + B)² = (30)² = 900A² + B² + 2AB = 900Therefore, A² + B² = 900 - 2 x 94 = 900 - 188 = 712
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 ? 4 2 1 3 4 2 1 3 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (10x + y) - (10y + x) = 36,9(x - y) = 36/9 = 4