Number System What is the sum of all the prime numbers from 20 to 40? 117 118 119 120 117 118 119 120 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 23 + 29 + 31 + 37 = 120
Number System √207.36 = ? 15.7 14.4 12.3 16.7 15.7 14.4 12.3 16.7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP √207.36 = √20736/√100 = 144/10 = 14.4
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 91/190 89/190 92/190 90/190 91/190 89/190 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 Find the number of factors of 300 excluding 1 and itself. 14 18 15 16 14 18 15 16 ANSWER DOWNLOAD EXAMIANS APP
Number System Which choice provides the answer : If 2 + 3 = 10, 6 + 5 = 66, 7 + 2 = 63, 9 + 7 = 144 then, 8 + 4 = ? 96 114 102 88 96 114 102 88 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 96
Number System Find the smallest number which when divided by 13 and 16 leaves respective remainders of 2 and 5. 197 219 187 207 197 219 187 207 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let 'N' is the smallest number which divided by 13 and 16 leaves respective remainders of 2 and 5.Required number = (LCM of 13 and 16) - (common difference of divisors and remainders) = (208) - (11) = 197.
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