Number System When 102 is reduced from a number, the number gets reduced by 88%. What is that number ? 850 750 550 650 850 750 550 650 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 850
Number System {(742)² ÷ 36} ÷ 2 = ? 420.5 421.5 423.5 422.5 420.5 421.5 423.5 422.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (174 x 174/36) ÷ 2 = 841/2 = 420.5
Number System In a two-digit number, if it is known that its unit's digit exceeds its ten's digit by 2 and that the product of the given number and the sum of its digits is equal to 144, then the number is: 46 42 26 24 46 42 26 24 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the ten's digit be x. Then, unit's digit = x + 2. Number = 10x + (x + 2) = 11x + 2 Sum of digits = x + (x + 2) = 2x + 2 (11x + 2)(2x + 2) = 144 2x2 + 26x - 140 = 0 (x - 2)(11x + 35) = 0 x = 2Hence, required number = 11x + 2 = 24.
Number System (4 86%of 6500) ÷ 36 =? 677.5 777.5 877.5 977.5 677.5 777.5 877.5 977.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 877.5
Number System An urn contains 9 blue, 7 white and 4 black balls. If 2 balls are drawn at random, then what is the probability that only one ball is white ? 92/190 89/190 91/190 90/190 92/190 89/190 91/190 90/190 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Total possible outcomes = 20C2 = 20 x 19/1 x 2 = 190Total favourable outcomes = 7C1 x 13C1 = 7 x 13 = 91∴ Required probability = 91/190
Number System Three numbers which are co-prime to one another are such that the product of the first two 551 and that of the last two is 1073. The sum of the three numbers is 93 110 85 74 93 110 85 74 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 85
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