Number System ?125÷5x ?=6265 124 153 1452 1253 124 153 1452 1253 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1253
Number System What is the value of ? in the following equations ? 72/? = ?/50 60 100 80 40 60 100 80 40 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 72 x 50= (6 x 6 x 2) x (5 x 5 x 2)= (6 x 5 x 2)² = (60)²∴ ? = 60
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 ? 32/51 37/52 34/55 31/58 32/51 37/52 34/55 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 number of prime factors of (6)10×(7)17×(55)27 41 91 101 61 41 91 101 61 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 91
Number System The difference between 68% of a number and 35% of the same number is 1216. What is 28% of the number ? 1027.75 1037.75 1043.75 1031.75 1027.75 1037.75 1043.75 1031.75 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be xTherefore 68x / 100 - 35x / 100 = 1216 Therefore x = 1216 x 100 / 33Therefore 28% of x = 28x / 100 = 1216 x 100 / 33 x 28 / 100= 1216 x 100 x 28 / 33 x 1/100 = 1031.75
Number System If the three fourth of a number is subtracted from the number; the value so, obtained is 163. What is that number ? 689 652 692 678 689 652 692 678 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number x (1 - 3/4) = 163∴ Number = 163 x 4 = 652
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