Number System Let R = qs—4. When s=8, R=16. When s=10, R is equal to 23 21 22 20 23 21 22 20 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 21
Number System When 102 is reduced from a number, the number gets reduced by 88%. What is that number ? 550 650 850 750 550 650 850 750 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 850
Number System 2/11 of 3/7 of 8/13 of 12012 = ? 241 321 449 576 241 321 449 576 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 2 x 3 x 8 x 12012/11 x 7 x 13 = 576
Number System What is the least number that should be added to 5200 to make it a perfect square ? 225 129 288 275 225 129 288 275 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP We sec (73)² = 5329 and (72)² = 5184ie 5329 > 5200 > 5184So 129 should be added to make is perfect square.
Number System A basket contains 5 blue, 4 green and 3 red ball. If three balls are picked at random, what is the probability that at least one is red ? 34/55 37/52 31/58 32/51 34/55 37/52 31/58 32/51 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Probability of having no red ball is9C3 / 12C3 = 21/55Probability of having at least one red ball is 1 - 21/55 = 34/55
Number System In a five-litre mixture of milk and water the portion of water is 30%. How much milk should be added to the mixture so that the portion of water reduces to 5% ? 29 litre 17 litre 21 litre 25 litre 29 litre 17 litre 21 litre 25 litre ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Original mixture = 5 litre; Milk = 3.5 litre;Water = 1.5 litre Let x litre of milk be added so thatthe mixture becomes (x + 5) litres and the percentage of water becomes 5%So, 1.5 = (x + 5) x 5/10030 = x + 5∴ x = 25 litre
EXAMIANS