Number System If (72)² is subtracted from the square of a number, the answer thus obtained is 4617. What is the number ? 95 103 92 99 95 103 92 99 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x² - (72)² = 467Therefore, x² = 4617 + 5184Therefore, x² = 9801 Therefore, x = 99
Number System √360 - 225 x 2 + 379 = ? 19 20 17 18 19 20 17 18 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √360 - 225 x 2 + 379 = √360 - 450 + 379 = √289= 17
Number System If the sum and difference of two numbers are 20 and 8 respectively, then the difference of their square is: 180 160 12 28 180 160 12 28 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x and y. Then, x + y = 20 and x - y = 8x2 - y2 = (x + y)(x - y) = 20 * 8 = 160.
Number System Complete the series : 1, 8, 27, 64, 125, 216 ..... 363 353 343 373 363 353 343 373 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 343
Number System 65% of 320+?=686 481 479 478 480 481 479 478 480 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 65% of 320+?=686 208+?=686?=686-208?=478
Number System 1089/? = ?/1296 1278 1188 1082 1348 1278 1188 1082 1348 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 1089 x 1296(?)²= (11 x 11 x 9) x (12 x 12 x 9)(?)= 11 x 12 x 9= 1188
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