Number System What is the difference between the largest number and the least number written with the digits 7, 3, 1, 4? 6184 6084 6048 5084 6184 6084 6048 5084 ANSWER DOWNLOAD EXAMIANS APP
Number System An urn contains 9 blue, 7 white and 4 black balls. If 2 balls are drawn at random, then what is the probability that only one ball is white ? 90/190 89/190 91/190 92/190 90/190 89/190 91/190 92/190 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Total possible outcomes = 20C2 = 20 x 19/1 x 2 = 190Total favourable outcomes = 7C1 x 13C1 = 7 x 13 = 91∴ Required probability = 91/190
Number System In a division sum, the quotient is 120, the divisor 456 and the remainder 333, find the dividend? 50553 5553 55053 56053 50553 5553 55053 56053 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 120 * 456 + 333 = 55053
Number System What is the sum of 1 + 2 + 3+ ... + 27 ? 343 378 396 382 343 378 396 382 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Sum = 27 x (27 + 1)/2= 27 x 28/2= 27 x 14= 378
Number System If the three fourth of a number is subtracted from the number; the value so, obtained is 163. What is that number ? 692 678 652 689 692 678 652 689 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number x (1 - 3/4) = 163∴ Number = 163 x 4 = 652
Number System How many numbers up to 100 are divisible by 7? 14 93 100 107 14 93 100 107 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 100/7 = 14 2/7 => 14 Numbers
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