Number System If one-seventh of a number is 55 then 40% of that number = ? 154 147 171 163 154 147 171 163 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x , Therefore, x/7 = 55Therefore, x = 55 x 7 = 385Therefore, 49% of 385 = 154
Number System What is the difference between the local value of 7 and 5 in the number 2574? 403 570 430 413 403 570 430 413 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 500 – 70 = 430
Number System In a 150-litre mixture of milk and water, the percentage of milk is 84%. How much water should be added so that the percentage of milk becomes 52.5% ? 90 litre 95 litre 80 litre 85 litre 90 litre 95 litre 80 litre 85 litre ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In 150 litre, milk is 84%ie 150 x 84/100 = 126 litre Let us add x litres of waterTherefore, the quantity of mixture = 150 + x∴ 52.5% of (150 + x) = 126 litres 150 + x = 126x100/52.5 = 240 litres∴ x = 240 - 150 = 90 litres
Number System If the numberator of a fraction is increased by 50% and denominator by 20% the fraction become 9/15. What was the original fraction ? 13/25 3/5 12/25 6/7 13/25 3/5 12/25 6/7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the fraction be x/yWe have 150x/120y = 9/15= x/y = 12/25
Number System If the sum of one-half of a number exceeds one-third of that number by 7 1/3, the number is: 20 30 18 15 20 30 18 15 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,(1/2 x + 1/5 x) - 1/3 x = 22/311/30 x = 22/3x = 20
Number System If a number is subtracted from its square we get 272. Find the number? 14 22 24 17 14 22 24 17 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x2 – x = 272 => x =17
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