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The phrase "Each of the books" is singular, so the correct verb form should be "is valuable."
Shankar borrowed Rs. 7,200 at simple interest and repaid an amount of Rs. 9,504 after 7 years. If the interest rate p.a charged for first 4 years was 5...
At what % of simple interest per annum will Rs. 600 amount to Rs. 780 in five years?
The interest earned on investing Rs. 1000 for 2 years at the rate of 20% p.a., compounded annually, is used to purchase an article. If the article is la...
A took loan from a bank at the rate of 17%p.a. simple interest. After 5 years he had to pay Rs.6800 interest only for the period. The principal amount b...
Atul has Rs.550 with him. He invested 40% of the amount at 5% p.a. for 6 years and rest at 20% p.a. for 5 years. Find the sum of simple interests receiv...
The interest received by investing Rs. 2900 for 2 years at compound interest of 20% p.a., compounded annually, was re-invested for 3 years at simple int...
Rohit invested a certain amount at a simple interest rate of r% per annum, which increased to 180% of the original amount over 5 years. If Rs. 2500 is...
Invest Rs. (3x + 150) at 12% per annum to earn Rs. 1080 after 3 years. Find the interest earned when Rs. (2x - 50) is invested at the same interest rate...
A certain sum of money earns Rs. 360 as Simple Interest and Rs. 381.6 as Compound Interest over a period of 2 years. What is the rate of interest?
