Number System 728.038 x 54.978 - 72.016 x 85.250 = ? 53900 23900 33900 43900 53900 23900 33900 43900 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 728 x 55 - 72 x 85.25 = 40040 - 6138 = 339900
Number System Which number should replace question mark (?) in the following equation ? ?/342 = 38/? 118 112 114 116 118 112 114 116 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 342 x 38Therefore, ? = √342 x 38 = √38 x 9 x 38 = 38 x 3 = 114
Number System How many times the keys of a typewriter have to be pressed in order to write first 400 counting numbers? 1092 1082 1192 1200 1092 1082 1192 1200 ANSWER DOWNLOAD EXAMIANS APP
Number System What is the sum of all even numbers from 1 to 701? 122550 123850 122500 122850 122550 123850 122500 122850 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 700/2 = 350350 * 351 = 122850
Number System The sum of four consecutive even numbers is 36. Find the sum of the squares of these numbers? 252 296 388 344 252 296 388 344 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the four numbers be x, x + 2, x + 4 and x + 6.=> x + x + 2 + x + 4 + x + 6 = 36=> 4x + 12 = 36 => x = 6The numbers are 6, 8, 10 and 12.Sum of their squares = 62 + 82 + 102 + 122 = 36 + 64 + 100 + 144 = 344.
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 82 81 83 84 82 81 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x² - (17*17*17) = 2143or x² = 2143 + 4913 = 7056∴ x = 84
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