Number System The product of two consecutive position odd numbers is 6723. What is the smaller number? 79 74 83 71 79 74 83 71 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP n x (n + 2) = 6723= n² + 2n - 6723 = 0= n² + 83n - 81n - 6723 = 0= n(n + 83) - 81 (n + 83) = 0Therefore, (n - 81) (n + 83) = 0Therefore, n = 81, n + 2 = 83
Number System (1024—263—233)÷(986—764— 156) =? 8 6 10 None of these 8 6 10 None of these ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8
Number System A number when multiplied by five times of itself give the value equal to 1445. What is the number ? 15 17 18 16 15 17 18 16 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x x 5x = 1445= 5x² = 1445= x² = 289∴ x = 17
Number System What is the remainder when 263251 is divided by 9? 6 3 8 1 6 3 8 1 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP If the sum of the digits of a number is divisible by 9, the number will be divisible by 9.2 + 6 + 3 + 2 + 5 + 1 = 19The nearest multiple of 9 is 18.19 - 18 = 1.
Number System What is the sum of 1 + 2 + 3+ ... + 27 ? 382 378 343 396 382 378 343 396 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Sum = 27 x (27 + 1)/2= 27 x 28/2= 27 x 14= 378
Number System If (182)² is added to the square of a number, the answer so obtained is 47765. What is the number ? 101 111 121 131 101 111 121 131 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be xTherefore x² + (182)² = 47765Therefore x² = 47765 - (182)2 = 47765 - 33124Therefore x² = 14641, Therefore x = 121
EXAMIANS