Number System A number when multiplied by five times of itself give the value equal to 1445. What is the number ? 15 16 18 17 15 16 18 17 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x x 5x = 1445= 5x² = 1445= x² = 289∴ x = 17
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% ? 25 litre 21 litre 17 litre 29 litre 25 litre 21 litre 17 litre 29 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 (800 / 64) * (1296 / 36) = ? None of these 420 500 460 None of these 420 500 460 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Given Exp.= 800/64 * 1296/36 = 12.5 * 36 = 450
Number System The sum of the numbers is 264. If the first number be twice the second and third number be one-third of the first, then the second number is: 54 48 84 72 54 48 84 72 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the second number be x. Then, first number = 2x and third number = 2x/3.2x + x + 2x/3 = 26411x/3 = 264x = 72
Number System Write the next number in the series : 14, 16, 13, 17, 12, 18, 11 .... 15 19 7 1 15 19 7 1 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 19
Number System If the numerator of a fraction is increased by 200% and the denominator by 300%, the fraction thus obtained is 1/36. What is the original fractions ? 4/9 3/9 6/9 5/9 4/9 3/9 6/9 5/9 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the fractions be x/yx + 200% of x/y + 300% of y = 1/3= x + 2x/y + 3y = 1/3= 3x/4y = 1/3Hence x/y = 4/9
EXAMIANS