Number System A certain number when divided by 45 leaves a remainder 31, what is the remainder if the same number be divided by 15? 9 1 11 13 9 1 11 13 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 45 + 31 = 76/15 = 1 (Remainder)
Number System Find out the smallest possible number which will be divisible by 1122 as well as 153. 1366 3366 4366 2366 1366 3366 4366 2366 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3366
Number System The number of prime factors of (6)10×(7)17×(55)27 101 61 41 91 101 61 41 91 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 91
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 31/58 32/51 37/52 34/55 31/58 32/51 37/52 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 difference between a positive proper fraction and its reciprocal is 9/20. The fraction is: 5/4 4/5 3/10 3/5 5/4 4/5 3/10 3/5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1/x - x = 9/20 20x2 + 9x - 20 = 0 20x2 + 25x - 16x - 20 = 0 5x(4x + 5) -4(4x + 5) = 0(4x + 5)(5x - 4) = 0x = 4/5
Number System A number consists of two digits. If 3/5 of 1/5 of the number is 9. Find the sum of its two digits? 7 12 60 8 7 12 60 8 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x * 3/5 * 1/5 = 9x = 75 => 7 + 5 = 12
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