Number System Which is the largest fraction among the following ? 12/13 21/22 21/23 24/25 12/13 21/22 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 How many times the keys of a typewriter have to be pressed in order to write first 400 counting numbers? 1092 1082 1200 1192 1092 1082 1200 1192 ANSWER DOWNLOAD EXAMIANS APP
Number System In how many different ways can the letters of word "COLLEGE" be arranged ? 1300 1260 1240 1280 1300 1260 1240 1280 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number of ways = 7!/2!2! = 1260(∵ L and E come twice)
Number System A certain number of two digits is three times the sum of its digits. If 45 be added to it, the digits are reversed. The number is: 30 22 24 27 30 22 24 27 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 27
Number System 1089/? = ?/1296 1348 1082 1188 1278 1348 1082 1188 1278 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
Number System A number when multiplied by five times of itself give the value equal to 1445. What is the number ? 18 16 17 15 18 16 17 15 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x x 5x = 1445= 5x² = 1445= x² = 289∴ x = 17
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