Percentage, ratio, proportion and unitary method.
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Q1 · Percentage and Ratio · EASY
In a class of 40 students, 24 are girls. What percentage of the class are boys?
Q2 · Percentage and Ratio · EASY
The ratio of the ages of Ramesh and Suresh is 5:7. If Suresh is 28 years old, what is Ramesh's age?
Q3 · Percentage and Ratio · MEDIUM
A shopkeeper marks his goods 30% above the cost price and gives a discount of 10%. What is his profit percentage?
Q4 · Percentage and Ratio · MEDIUM
If 8 men can complete a work in 12 days, how many days will 6 men take to complete the same work?
Q5 · Percentage and Ratio · HARD
Two numbers are in the ratio 3:5. If 9 is added to each number, the ratio becomes 12:17. Find the smaller number.