Number System Sum of two numbers is 15. Two times of the first exceeds by 5 from the three times of the other. Then the numbers will be? 9, 6 7, 8 10, 5 6, 9 9, 6 7, 8 10, 5 6, 9 ANSWER DOWNLOAD EXAMIANS APP
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 ? 34/55 37/52 32/51 31/58 34/55 37/52 32/51 31/58 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
Number System The sum of two numbers is 165 and the difference between them is 9. What is the average of these two numbers ? 84.5 82.5 83.5 85.5 84.5 82.5 83.5 85.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 165x - y = 92x = 174 ∴ x = 87 and y = 78∴ x + y/2 = 165/2 = 82.5
Number System The difference between 72% of a number and 49% of the same number is 575. What is 9% of that number ? 295 225 245 275 295 225 245 275 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x.Therefore, 72% of x - 49% of x = 575Therefore, (72 - 49)% of x = 575Therefore, 9% of x = 575/23 x 9 = 225
Number System 1089/? = ?/1296 1188 1278 1082 1348 1188 1278 1082 1348 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 1089 x 1296(?)²= (11 x 11 x 9) x (12 x 12 x 9)(?)= 11 x 12 x 9= 1188
Number System How many numbers up to 100 are divisible by 7? 107 93 100 14 107 93 100 14 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 100/7 = 14 2/7 => 14 Numbers
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