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 The average age of seven boys sitting in a row facing North is 26 years. If the average age of first three boys is 19 years and the average age of last three boys is 32 years, what is the age of the b 29 years 31 years 28 years 30 years 29 years 31 years 28 years 30 years ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Age of the fourth boy = (26 x 7 - 3 x 19 - 3 x 32) years = (182 - 57 - 96) years = 29 years
Number System Which is the largest fraction among the following ? 21/22 12/13 21/23 24/25 21/22 12/13 21/23 24/25 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 21/23 = 0.913,12/13 = 0.92323/25 = 0.92, 21/22 = 0.9545, 24/25 = 0.96
Number System What is the sum of 1 + 2 + 3+ ... + 27 ? 343 382 378 396 343 382 378 396 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Sum = 27 x (27 + 1)/2= 27 x 28/2= 27 x 14= 378
Number System A number when divided by 221 gives a remainder 43, what remainder will be obtained by dividing the same number 17? 11 9 5 10 11 9 5 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 221 + 43 = 264/17 = 9 (Remainder)
Number System 3251 + 587 + 369 - ? = 3007 1200 1300 1250 1375 1200 1300 1250 1375 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let 4207 - x = 3007 Then, x = 4207 - 3007 = 1200
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