Number System If (17)3 is subtracted from the square of a number, the answer so obtained is 2143. What is the number ? 83 84 81 82 83 84 81 82 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x² - (17*17*17) = 2143or x² = 2143 + 4913 = 7056∴ x = 84
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 7 10 9 8 7 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x Therefore, x² + (47)² = 2290Therefore, x² = 2290 - 2209 = 81Therefore, x = 9
Number System If the sum of four consecutive numbers is 370, which the following is the third lowest number among them 91 90 92 89 91 90 92 89 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the four consecutive numbers be x, (x + 1), (x + 2), (x + 3) thenx + (x + 1) + (x + 2) + (x + 3) = 370= 4x + 6 = 370∴ x = 364/4 = 91∴ third lowest number among them = x + 1= 91 + 1 = 92
Number System What is the sum of the local values of the digits 2, 3, 4, 5 in the number 2345? 2435 2345 2105 5243 2435 2345 2105 5243 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2000 + 300 + 40 + 5 = 2345
Number System (12)² - (4.4)² - (0.04)² = ? 129.6384 124.6384 125.6384 131.6384 129.6384 124.6384 125.6384 131.6384 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 Which is the smallest fractions among the following ? 15/19 27/31 11/13 13/15 15/19 27/31 11/13 13/15 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 11/13 = 0.8461,13/15 = 0.8666,27/31 = 0.87,15/19 = 0.789
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