Comparing Quant...

A shopkeeper sells some articles at the profit of $$25$$% on the original price. What is the exact amount of profit? To find the answer, which of the following information given in Statements I and II is/are necessary?
I. Sale price of the article
II. Number of articles sold

What will you call the extra amount of money you got as profit, after investing a certain amount?

A man buys pencils at the rate of $$6$$ for $$Rs. \ 5\ $$and sells them at $$5$$ for $$Rs.  \ 6$$. What is his profit $$\%$$?

The principal is Rs. $$1000$$, so if you pay off Rs. $$300$$, the remaining Rs. $$700$$ left to repay is also called the

Determine the principal when time $$= 2$$ years, interest $$=$$ Rs.$$ 1000$$; rate $$= 2\%$$ p.a.

Calculate the principal when time $$= 4$$ years, interest $$=$$ Rs. $$4000$$; rate = $$10$$% p.a

Find rate, when principal = Rs. $$30,000$$; interest = Rs. $$900$$; time = $$3$$ years.

Calculate the principal when time $$= 10$$ years, interest $$=$$ Rs. $$4000$$; rate = $$5\%$$ p.a.

What percentage is equivalent to $$\dfrac {5}{8}$$ ?

Identify which amount is the original amount of money, the amount before any interest is applied?