Sita has $₹8200$ where the number of $₹500$ notes is twice that of $₹100$ and the number of $₹1000$ notes is three times that of $₹100$. Find the number of $₹1000$ notes with Sita.

Divide $₹2890$ between $A, B$ and $C$ such that $A:B=1:2$ and $B:C=3:4$

The runs scored by three batsmen $A, B \mathrm{and} C$ in a cricket match are in the ratio $A:B=B:C=1:2$. If the total of their runs is $364$ then find the runs scored individually by each batsman.

The salaries of three workers $A, B \mathrm{and} C$ are in the ratio $2:3:5$. If their salaries are respectively increased by $15\%, 10\%$ and $20\%$ then what will be the ratio of their new salaries?

Three persons earn a profit of $₹70,000$ in a business which they to divide in the ratio $A:B = 4:2$ and $B:C = 10:5$. How much money will each person get? The money received by $A$ would be how many times the money received by $C$?

A bag contains $₹1, ₹2$ and $₹5$ coins. If the coins are in the ratio $1:2:5$ and the total money in the bag is $₹1590$ then find the number of each type of coin.

We have $100$ liters of a mixture of milk and water which is $10\%$ water. How much more pure milk should be added so that the new mixture has only $5\%$ water?

Think of some examples of inverse proportions or inverse relations.

Three persons $A, B \mathrm{and} C$ can complete a task in $12, 15 \mathrm{and} 10$ days respectively. If they all work together, how long will they take to complete the task?