A sum of ₹2,500 becomes ₹2,975 in 3 years at simple interest. What is the rate of interest?

The ratio of copper and zinc in a brass alloy is 13 : 7. How much zinc will be there in 100 kg of the alloy?

The prices of two cycles are in the ratio 16 : 23. If the price of the first cycle is increased by 10% and that of the second by ₹477, the ratio becomes 11 : 20. Find the original price of the second cycle.

The ratio of copper and zinc in an alloy is 5 : 4. If 1.25 kg of zinc is added to 11.25 kg of this alloy, find the new ratio of copper to zinc.

The ratio of the ages of X and Y is 3 : 1. After 15 years, the ratio will be 2 : 1. Find the present age of X.

In a partnership, A and B start a business by investing ₹20,000 and ₹25,000 respectively. After 4 months, C joins them with ₹15,000. Find the ratio of their profits at the end of the year.

If the ratio of the areas of two circles is 4 : 9, then the ratio of their circumferences is:

The ratio of the ages of A and B is 4 : 5. If the sum of their ages is 81 years, find the age of B after 5 years.

A bag contains ₹1, 50p, and 25p coins in the ratio 5 : 6 : 8. If the total value is ₹420, find the number of 50p coins.

The ratio of the speeds of two cars is 3 : 4. If the first car covers a distance of 150 km in 5 hours, find the speed of the second car.

The ratio of the cost price and selling price of an article is 8 : 9. What is the profit percentage?

A mixture of 40 litres of milk and water contains milk and water in the ratio 3 : 1. How much water must be added to this mixture so that the ratio of milk and water becomes 2 : 1?

In a partnership, A, B, and C invest ₹20,000, ₹25,000, and ₹30,000 respectively. If the total profit at the end of the year is ₹15,000, find B's share of the profit.

If 10 men can complete a work in 12 days, how many men are required to complete the same work in 8 days?

The ratio of the ages of X and Y is 7 : 3. After 4 years, the ratio becomes 2 : 1. What is the present age of X?

A sum of ₹1200 amounts to ₹1320 in 2 years at simple interest. What is the rate of interest per annum?

What is the decimal equivalent of the binary number 1010?

With reference to the 'Sagarmatha Friendship' exercise, which two countries are involved?

Seats for Mathematics, Physics and Biology in a school are in the ratio 5:7:8. There is a proposal to increase these seats by 40%, 50% and 75% respectively. What will be the ratio of increased seats?

A person buys a watch for ₹1200 and sells it for ₹1500. What is the profit percentage?