Number System Pick the wrong number from the given number series. 3,4,10,33,135,685,4116 135 10 33 685 135 10 33 685 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The correct number is 136.3 x 1 + 1 = 44 x 2 + 2 = 1010 x 3 + 3 = 3333 x 4 + 4 = 136136 x 5 + 5 = 685685 x 6 + 6 = 4116
Number System How many numbers up to 200 are divisible by 2 and 3 both? 33 27 29 35 33 27 29 35 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 200/6 = 33 2/6 => 33 Numbers
Number System (4.6 x 2.8 x 5.5) - (3.2 x 4.5 x 2.8) = ? 29.81 27.54 28.56 30.52 29.81 27.54 28.56 30.52 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (4.6 x 2.8 x 5.5) - (3.2 x 4.5 x 2.8) = 70.84 - 40.32 = 30.52
Number System A box contains 5 red, 4 black and 4 blue balls. If 3 balls are drawn randomly from the box, what is the probability that there are exactly 2 blue balls in the three drawn balls ? 30/146 29/145 27/143 28/144 30/146 29/145 27/143 28/144 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Total balls = 5 + 4 + 4 = 13∴ n(S) = 13C3 = 2862 blue balls can be selected from 4 balls in 4C2 = 6 ways and the remaining one ball is to be selected from 9 balls in 9C1 = 9 ways ∴ n(E) = 6 x 9∴ P(E) = 6 x 9/286 = 27/143
Number System A certain number when divided by 39 leaves a remainder 20, what is the remainder when the same number is divided by 13? 0 7 5 11 0 7 5 11 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 39 + 20 = 59/13 = 7 (Remainder)
Number System What is the least number, which is perfect square but contains 2700 as its factor? 10800 2700 5400 1800 10800 2700 5400 1800 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 900 * 3 * 3 = 8100
EXAMIANS