Number System In how many different ways can be the letters of the word PENCIL be arranged among themselves ? 720 510 860 640 720 510 860 640 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Total six letters are there and hence the number of arrangements = 6! = 6 x 5 x 4 x 3 x 2 x 1 = 720
Number System ?2704 x ?2209=? 4444 2444 3444 1444 4444 2444 3444 1444 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2444
Number System √343 = ? 21 19 18 20 21 19 18 20 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √343 = 18
Number System Complete the series : 81, 69, 58, 48, 39 ........ 29 28 31 30 29 28 31 30 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 31
Number System In how many ways can 5 boys be chosen from 6 boys and 4 girls so as to include exactly one girl ? 58 56 60 54 58 56 60 54 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP One girl can be chosen in 4C1 = 4 ways and 4 boys can be chosen in 6C4 = 15 ways ∴ Total number of ways = 4 x 15 = 60 ways.
Number System A canteen requires 17 dozen of eggs per week. How many eggs will it require from January 1 to February 11 ? 987 1224 525 820 987 1224 525 820 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number of days from Jan 1 to Feb 11th= 31 + 11 = 42 days = 6 weeks∴ Total eggs =17 x 12 x 6 = 1224
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