Number System The difference between the two digit number and the number obtained by interchanging its digits is 54. The difference between the digits is? 6 1 4 Nothing can be said. 6 1 4 Nothing can be said. ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (10x + y) – (10y + x) = 54x – y = 6
Number System √343 = ? 19 18 20 21 19 18 20 21 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √343 = 18
Number System What is the sum of all the prime numbers from 20 to 40? 117 118 120 119 117 118 120 119 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 23 + 29 + 31 + 37 = 120
Number System What is the missing number in this series? 8 2 14 6 11 ? 14 6 18 12 7 3 2 9 7 3 2 9 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 9
Number System 1260 x 1.45 - 888 x 1.75 = ? 256 367 273 295 256 367 273 295 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 1260 x 1.45 - 888 x 1.75= 1827 - 1554 = 273
Number System A basket contains 5 blue, 4 green and 3 red ball. If three balls are picked at random, what is the probability that at least one is red ? 31/58 34/55 37/52 32/51 31/58 34/55 37/52 32/51 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Probability of having no red ball is9C3 / 12C3 = 21/55Probability of having at least one red ball is 1 - 21/55 = 34/55
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