Number System What is the sum of 1 + 2 + 3+ ... + 27 ? 382 396 378 343 382 396 378 343 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Sum = 27 x (27 + 1)/2= 27 x 28/2= 27 x 14= 378
Number System 7.98 x 3.75 + 1.28 x 15.5 = ? 47.765 48.765 49.765 46.765 47.765 48.765 49.765 46.765 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 29.925 + 19.84 = 49.765
Number System If (83)² is subtracted from the square of a number, the answer so obtained is 8487. What is the number ? 124 163 179 146 124 163 179 146 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x Therefore, x² - (83)² = 8487x² = 8487 + (83)²x² = 8487 + 6889x² = 15376Therefore, x² = 15376 x = 124
Number System Sum of two numbers is 80. Greater number exceeds by 5 from four times of the smaller. Find the numbers? 60, 20 65, 15 64, 16 62, 18 60, 20 65, 15 64, 16 62, 18 ANSWER DOWNLOAD EXAMIANS APP
Number System Write the next number in the series : 14, 16, 13, 17, 12, 18, 11 .... 19 15 1 7 19 15 1 7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 19
Number System The difference between 71% of a number and 46% and of the same number is 212. What is 75% of that number 724 673 845 636 724 673 845 636 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ 71% of x - 46% of x = 212∴ (71 - 46)% of x = 212∴ 25/100 x x = 212∴ x = 212 x 4 = 848∴ 75% of 848 = 848 x 75/100 = 636
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