Number System 2536+4851—?=3450+313 6784 3624 5243 4567 6784 3624 5243 4567 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3624
Number System If (35)² is added to the square of a number the answer so obtained is 1394. What is the number ? 11 15 17 13 11 15 17 13 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x Therefore, x² + (35)² = 1394Therefore, x² = 1394 - (35)² = 1394 - 1225 = 169Therefore, x = √169 = 13
Number System A basket contains eight white and ten black balls. Two draws of one ball each are made without replacement. What is the probability that one ball is white and the other ball is black ? 80/153 80/152 80/150 80/151 80/153 80/152 80/150 80/151 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Two balls can be drawn from 18 balls in 18C2 Ways, ie 153 ways. One white from 8 white balls can be drawn in 8C1 = 8 ways and one black ball from 10 black can be drawn in 10C1 = 10 ways.∴ n(S) = 153, n(E) = 8 x 10 = 80∴ P(E) = 80/153
Number System 93296 - 45874 + 20382 - 56817 = ? 109887 109857 109867 109877 109887 109857 109867 109877 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 113678 - 102691 = 109887
Number System What is the sum of 1 + 2 + 3+ ... + 27 ? 343 378 396 382 343 378 396 382 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Sum = 27 x (27 + 1)/2= 27 x 28/2= 27 x 14= 378
Number System Find out the smallest possible number which will be divisible by 1122 as well as 153. 2366 1366 4366 3366 2366 1366 4366 3366 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3366
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