Number System Let R = qs—4. When s=8, R=16. When s=10, R is equal to 20 23 22 21 20 23 22 21 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 21
Number System √(17)² + (17)² + (5)² - 2 = ? 16 17 18 19 16 17 18 19 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √49 + 289 + 25 - 2 = √361 = 19
Number System 3251 + 587 + 369 - ? = 3007 1375 1200 1300 1250 1375 1200 1300 1250 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let 4207 - x = 3007 Then, x = 4207 - 3007 = 1200
Number System How many numbers between 300 and 800 can be by using digits 2, 4, 5, 6 and 0 ? 48 36 56 52 48 36 56 52 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ∴ Reqd . numbers = 3 x 4P2 = 3 x 12 = 36
Number System The difference between two integers is 5. Their product is 500. Find the numbers. 15, 20 20, 25 21, 26 30, 25 15, 20 20, 25 21, 26 30, 25 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the integers be x and (x + 5). Then, x(x + 5) = 500 x2 + 5x - 500 = 0 (x + 25)(x - 20) = 0 x = 20So, the numbers are 20 and 25.
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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