Saket Sharma Solutions for Exercise 1: Exercise 1

The annual income of a person decreases by $₹64$if the annual rate of interest decreases from $4\%$ to $3.75\%$. What is his original annual income?

Out of a total $85$ children playing badminton or table tennis or both, total number of girls in the group is $70\%$ of the total number of boys in the group. The number of boys playing only badminton is $50\%$ of the number of boys and the total number of boys playing badminton is $60\%$ of the total number of boys. The number of children playing only table tennis is $40\%$ of the total number of children and a total of $12$ children play badminton and table tennis both. What is the number of girls playing only badminton is:

A person bought two articles X and Y from a department store. The sum of prices before sales tax was ₹$130$ there was no sales tax on the article X and $9\%$ sales tax on the article Y. The total amount the person paid, including the sales tax was ₹$136.75$ .What was the price of the article Y before sales tax ? 

$x, y \text{and} z$ are three numbers such that $x$ is $30\%$ of $z$ and $y$ is $40\%$ of $z$. If $x$ is $p\%$ of $y,$ then what is the value of $p$?

If an article is sold at gain of $6\%$ instead of a loss of  $6\%$, the seller gets $₹6$ more. What is the cost price of the article?

The price of an article X increases by $20\%$ every year and price of article Y increases by $10\%$ every year. In the year $2010$, the price of article X was $₹5000$ and price of article Y was $₹2000$. In which year the difference in their prices exceeded $₹5000$ for the first time?

The number of items in a booklet is $N$. In the first year there is an increase of $x\%$ in this number and in the subsequent year there is a decrease of $x\%$. At the end of the two years, what will be the number of items in the booklet ?

The following Bar chart gives the production of cars by three different companies X, Y, Z in different years:

In which year was the percentage increase in production of cars minimum as compared to its previous year?