Profit and Loss...

A man sells an article at a gain of 10%. If he had bought it at 10% less and sold it for Rs. 132 less, he would have still gained 10%. The cost price of the article is

According to a survey, the population of a city increases by 10% every year for two years and then decreases by 10% every year for two years. If the population 4 years ago was 100000, what will it be after four years?

A watch was sold at a loss of 10 percent. If it was sold for $70 more, there would have been a gain of 4 percent. What was the CP of the watch?

A man spends 85% of his income. If he saves $37.50, find the salary.

In an election between two candidates, Mr. Hero secures 45% of the total votes, but is defeated by Mr. Zero by 300 votes. Find out the total number of votes polled, if it is known that all the votes polled are valid.