Number System The sum of three consecutive even numbers is 252. What is the sum of the smallest and the largest numbers? 171 168 170 169 171 168 170 169 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 168
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% ? 17 litre 29 litre 21 litre 25 litre 17 litre 29 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
Number System In how many different ways can the letters of the word ANATOMY be arranged ? 2504 2508 2510 2520 2504 2508 2510 2520 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Here total letters are 7 but A comes twice.Therefore, Numbers of arrangements = 7!/2! = 2520
Number System Find the number, when 15 is subtracted from 7 times the number, the result is 10 more than twice of the number 5 7.5 15 4 5 7.5 15 4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.7x -15 = 2x + 10 => 5x = 25 => x = 5
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 ? 31/58 34/55 37/52 32/51 31/58 34/55 37/52 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 What is 846 times 323 ? 283298 273258 293798 264258 283298 273258 293798 264258 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 846 x 323 = 273258
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