Number System What is the sum of 1 + 2 + 3+ ... + 27 ? 378 396 343 382 378 396 343 382 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Sum = 27 x (27 + 1)/2= 27 x 28/2= 27 x 14= 378
Number System 7589 - ? = 3434 4155 11023 4242 1123 4155 11023 4242 1123 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let 7589 - x = 3434Then x = 7589 - 3434 = 4155
Number System (12)² - (4.4)² - (0.04)² = ? 124.6384 131.6384 129.6384 125.6384 124.6384 131.6384 129.6384 125.6384 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (12)² - (4.4)² - (0.04)²= 144 - 19.36 - 0.0016= 124.64 - 0.0016= 124.6384
Number System If (47)² is added to the square of a number the answer thus obtained is 2290. What is the number ? 9 8 10 7 9 8 10 7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x Therefore, x² + (47)² = 2290Therefore, x² = 2290 - 2209 = 81Therefore, x = 9
Number System (12.11)2 + (?)2 = 732.2921 24.2 17.2 14.2 20.2 24.2 17.2 14.2 20.2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 24.2
Number System The sum of two numbers is 22. Five times one number is equal to 6 times the other. The bigger of the two numbers is: 16 15 10 12 16 15 10 12 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x and (22 - x). Then,5x = 6(22 - x) 11x = 132 => x = 12So, the numbers are 12 and 10.
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