What will be the difference between simple and compound interest @ 10% per annum on a sum of Rs. 1000 after 4 years?

A 9% stock yields 8%. The market value of stock is

If A = x% of y and B = y% of x, then which of the following is true?

160% of 250+?=120% of 400

By investing Rs.1620 in 8% stock .Michael earns Rs. 135. The stock is then quoted at

If a material is sold for Rs.34.80, there is a loss of 25%. Find out the cost price of the material?

An automobile financier claims to be leading money at simple interest, but he includes the interest every six months for calculating the principal. If he is charging an interest of 10%, the effective rate of interest becomes:

When processing flower-nectar into honeybees' extract, a considerable amount of water gets reduced. How much flower-nectar must be processed to yield 1kg of honey, if nectar contains 50% water, and the honey obtained from this nectar contains 15% water?

A man invests a certain sum of money at 6%.p.a simple interest and another sum at 7%.p.a. simple interest. His income from interest after 2 years was Rs.354. One-fourth of the first sum is equal to one-fifth of the second sum. The total sum invested was:

The price of oil is increased by 25%. If the expenditure is not allowed to increase, the ratio between the reduction in consumption and the original consumption is