Unitary method, ratio, proportion, percentage and applications.
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Q1 · Ratio, Proportion and Percentage · EASY
A class has 18 boys and 12 girls. What is the ratio of boys to girls in simplest form?
Q2 · Ratio, Proportion and Percentage · EASY
If 5 pens cost Rs 75, what is the cost of 8 such pens using the unitary method?
Q3 · Ratio, Proportion and Percentage · MEDIUM
Two numbers are in the ratio 5 : 7. If their sum is 144, what is the larger number?
Q4 · Ratio, Proportion and Percentage · MEDIUM
A student scored 432 marks out of 600 in an examination. What is the percentage obtained by the student?
Q5 · Ratio, Proportion and Percentage · HARD
The ratio of milk to water in a mixture is 7 : 3. If the mixture contains 35 litres of milk, how much water should be added so that the ratio becomes 7 : 5?