L Mohan Lal Solutions for Exercise 1: PREVIOUS QUESTIONS

The population of a city increases by $20\%$ every year. If the present population is $72000$, then what was the population one year ago?

What is $16\%$ of $Rs.1250$?

What is $50\%$ of $40\%$ of $1200 gms$?

The length of a rectangle is increased by $30\%$, whereas the breadth is decreased by $25\%$. What is the consequent percentage change in the area of rectangle? 

A number when increased by $17\%$ becomes $2340$. What is the number?

In an election contested by two candidates, the candidate who get $43\%$ is rejected by a margin of $2856$ votes. Find the total number of votes polled given that all the votes polled are valid.

In an examination, there were $2000$ candidates, out of which $900$ were boys and rest were girls. If $32\%$ of the boys and $38\%$ of the girls passed, then the percentage of failure is:

In a test cricket match team. $A$ made $10\%$ of the total runs made by both teams more than team $B$. If team $B$ made $630$ runs, by how many runs did team $B$ lose the match?