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 6/7 12/25 13/25 3/5 6/7 12/25 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the fraction be x/yWe have 150x/120y = 9/15= x/y = 12/25
Number System If the average of two numbers is 88.5 and one number is 5.5 less than the average. Find out the next number. 97 86 91 94 97 86 91 94 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 94
Number System Let R = qs—4. When s=8, R=16. When s=10, R is equal to 20 21 23 22 20 21 23 22 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 21
Number System 217 * 217 + 183 * 183 = ? 80698 81268 80578 79698 80698 81268 80578 79698 ANSWER DOWNLOAD EXAMIANS APP
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% ? 85 litre 80 litre 95 litre 90 litre 85 litre 80 litre 95 litre 90 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 What is the value of ? in the following equations ? 72/? = ?/50 60 80 40 100 60 80 40 100 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 72 x 50= (6 x 6 x 2) x (5 x 5 x 2)= (6 x 5 x 2)² = (60)²∴ ? = 60
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