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? 7, 8 9, 6 10, 5 6, 9 7, 8 9, 6 10, 5 6, 9 ANSWER DOWNLOAD EXAMIANS APP
Number System What is the difference between the largest number and the least number written with the figures 3, 4, 7, 0, 3? 43983 43883 70983 43893 43983 43883 70983 43893 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 74330 Largest30347 Smallest-------------43983
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 ? 91/190 89/190 92/190 90/190 91/190 89/190 92/190 90/190 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 The sum of three consecutive multiples of 3 is 72. What is the largest number? 24 36 27 21 24 36 27 21 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be 3x, 3x + 3 and 3x + 6.Then,3x + (3x + 3) + (3x + 6) = 729x = 63x = 7Largest number = 3x + 6 = 27.
Number System 4/6 of 6/5 of 5/7 of a number is 96. Find the number. 170 168 162 164 170 168 162 164 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x x 4/6 x 6/5 x 5/7 = 96∴ x = 96 x 6 x 5 x 7/4 x 6 x 5 = 168
Number System How many times the keys of a typewriter have to be pressed in order to write first 400 counting numbers? 1092 1192 1082 1200 1092 1192 1082 1200 ANSWER DOWNLOAD EXAMIANS APP
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