Number System What is the sum of 1 + 2 + 3+ ... + 27 ? 343 378 382 396 343 378 382 396 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Sum = 27 x (27 + 1)/2= 27 x 28/2= 27 x 14= 378
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 21 litre 29 litre 25 litre 17 litre 21 litre 29 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 Find the nearest to 25268 which is exactly divisible by 467? 25228 25218 25308 25208 25228 25218 25308 25208 ANSWER DOWNLOAD EXAMIANS APP
Number System The difference between two integers is 5. Their product is 500. Find the numbers. 15, 20 20, 25 30, 25 21, 26 15, 20 20, 25 30, 25 21, 26 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the integers be x and (x + 5). Then, x(x + 5) = 500 x2 + 5x - 500 = 0 (x + 25)(x - 20) = 0 x = 20So, the numbers are 20 and 25.
Number System The square root of 0.0081 is: 0.9 0.09 0.009 0.91 0.9 0.09 0.009 0.91 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 0.09
Number System What is 846 times 323 ? 293798 273258 283298 264258 293798 273258 283298 264258 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 846 x 323 = 273258
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