Number System Difference between two numbers is 5, six times of the smaller lacks by 6 from the four times of the greater. Find the numbers? 12, 7 10, 5 11, 6 12, 9 12, 7 10, 5 11, 6 12, 9 ANSWER DOWNLOAD EXAMIANS APP
Number System The square root of 0.0081 is: 0.09 0.009 0.91 0.9 0.09 0.009 0.91 0.9 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 0.09
Number System The product of two consecutive position odd numbers is 6723. What is the smaller number? 71 79 74 83 71 79 74 83 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP n x (n + 2) = 6723= n² + 2n - 6723 = 0= n² + 83n - 81n - 6723 = 0= n(n + 83) - 81 (n + 83) = 0Therefore, (n - 81) (n + 83) = 0Therefore, n = 81, n + 2 = 83
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
Number System 450% of a number is 4725. What is 82% of that number ? 851 861 841 871 851 861 841 871 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x x 450/100 = 4725= x = 4725 x 100/450 = 1050∴ 82% of 1050 = 1050 x 82/100= 861
Number System How many numbers between 300 and 800 can be by using digits 2, 4, 5, 6 and 0 ? 36 48 56 52 36 48 56 52 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ∴ Reqd . numbers = 3 x 4P2 = 3 x 12 = 36
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