WBCS Mains 2019 Official Paper-VI

Simplify the following expression:

If the ratio of cost price and selling price is $25:26$, then what is the percentage of profit?

There is some loss if an article is sold at $\text{Rs. }120$. There is same amount of profit if the article is sold for $\text{Rs. }140$. What is the cost price of the article?

A man sold a stove for $\text{Rs. }423$ and incurred a loss of $6\%$. At what price should it be sold so as to earn a profit of $8\%$?

A man sold an article at a gain of $5\%$. Had he sold it for $\text{Rs. }240$ more, he would have gained $8\%$ . Find the cost price of the article.