Number System (√6 + 1)² = ? + 2√6 7 6 8 5 7 6 8 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (√6 + 1)² - 2√6= (√6)² + 2 x √6 + 1 + 1² - 2√6= 6 + 2√6 + 1 - 2√6 = 6 + 1 = 7
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 80/151 80/150 80/153 80/152 80/151 80/150 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 Supply the missing figure : 1, 4, 9, 16, 25 .... 49 16 42 23 36 16 42 23 36 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 36
Number System 3√103820 x 3√274620 = ? 3045 3055 3065 3035 3045 3055 3065 3035 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3√103820 = 47 and 3√274620 = 65 ∴ ? = 47 x 65 = 3055
Number System How many numbers up to 100 and 300 are divisible by 11? 22 21 18 20 22 21 18 20 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (300 – 100)/11 = 200/11 = 18 2/1118 Numbers
Number System A certain number successively divided by 2, 5 and 7 leaves remainders 1, 2 and 3 respectively. When the same number is divided by 70, what is the remainder? 33 34 36 35 33 34 36 35 ANSWER DOWNLOAD EXAMIANS APP
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