Find the annual installment that will discharge a debt of Rs 12900 due in 4 years at 5% per annum simple interest.
The difference between Simple Interest & Compound Interest for the fourth year is Rs 7280 at 20% per annum. What is the principal amount.
If a = 42 and b = 18, the value of a(a2 - 3a + 3) - b(b2 + 3b + 1) is
A can complete a certain work in 30 days. He started the work. After 4 days, B joined him and the whole work was completed in 10 days from the beginning. B alone can complete one-third of the same work in:
12 copies of a book were sold for Rs.1800/- thereby gaining the cost price of 3 copies. The cost price of a copy is