Number System When the square of a number is substracted from (68)², the answer so obtained is 2508. What is the number ? 45 47 46 44 45 47 46 44 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (68)² - x² = 2508Therefore, x² = 4624 = 2508Therefore, x = root of 2116 = 46
Number System In a fraction, twice the numerator is two more than the denominator. If 3 is added to the numerator and the denominator each, then the resultant fraction will be 2/3 .What was the original fraction 11/12 19/12 7/12 17/12 11/12 19/12 7/12 17/12 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 7/12
Number System What number should replace both the question marks (?) in the following question ? 85 83 82 84 85 83 82 84 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 84
Number System 16.23 x 12.9 + 17.32 = ? None of these 246.687 236.687 226.687 None of these 246.687 236.687 226.687 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 16.23 x 12.9 + 17.32= 209.367 + 17.32= 226.687
Number System Sum of two consecutive even terms lacks by 98 from their product. Find the sum of these number 32 None 24 18 32 None 24 18 ANSWER DOWNLOAD EXAMIANS APP
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 80/150 80/152 80/151 80/153 80/150 80/152 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
EXAMIANS