Number System What is the sum of 1 + 2 + 3+ ... + 27 ? 378 343 382 396 378 343 382 396 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Sum = 27 x (27 + 1)/2= 27 x 28/2= 27 x 14= 378
Number System A number when, 28 subtracted from it reduces to its one third. What is the value of 50% of that number? 21 42 84 24 21 42 84 24 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2/3 x = 28 => x = 4242 * 1/2 = 21
Number System What is the difference between the largest number and the least number written with the digits 7, 3, 1, 4? 5084 6084 6184 6048 5084 6084 6184 6048 ANSWER DOWNLOAD EXAMIANS APP
Number System In how many ways can 5 boys be chosen from 6 boys and 4 girls so as to include exactly one girl ? 60 58 54 56 60 58 54 56 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 9 3/4 + 7 2/17 - 9 1/15 = ? 9 719/1020 9 817/1020 7 719/1020 7 817/1020 9 719/1020 9 817/1020 7 719/1020 7 817/1020 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Given sum = 9 + 3/4 + 7 + 2/17 - (9 + 1/15)= (9 + 7 - 9) + (3/4 + 2/17 - 1/15)= 7 + (765 + 120 - 68)/1020 = 7 817/1020
Number System Difference between two numbers is 5, six times of the smaller lacks by 6 from the four times of the greater. Find the numbers? 11, 6 12, 9 12, 7 10, 5 11, 6 12, 9 12, 7 10, 5 ANSWER DOWNLOAD EXAMIANS APP
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