Number System 217 * 217 + 183 * 183 = ? 81268 79698 80578 80698 81268 79698 80578 80698 ANSWER DOWNLOAD EXAMIANS APP
Number System When (21)² is subtracted from the square of a number the answer obtained is 1584. What is the number ? 35 65 45 55 35 65 45 55 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.According to the question,x² - (21)² = 1584= x² - 441 = 1584 = x² = 1584 + 441 = 2025∴ x = √2025 = 45
Number System What is the sum of the local values of the digits 2, 3, 4, 5 in the number 2345? 2345 5243 2105 2435 2345 5243 2105 2435 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2000 + 300 + 40 + 5 = 2345
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 ? 80/151 80/152 80/150 80/153 80/151 80/152 80/150 80/153 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 Find the least number with which 16200 should be multiplied, to make it a perfect cube. 36 48 45 360 36 48 45 360 ANSWER DOWNLOAD EXAMIANS APP
Number System Supply the missing figure : 1, 4, 9, 16, 25 .... 49 16 42 36 23 16 42 36 23 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 36
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