The price of an article is Rs. $100$. Its price is increased by $10 \%$,and then again its price is increased by $10 \%$. What is the total increase in the price?

The price of rice is reduced by $2 \%$. How many kilograms of rice can now be bought for the money which was sufficient to buy $49 \text{ kg}$ of rice earlier?

The population of a town increases by $5 \%$ annually. If its population in $2001$ was $138915$,what was it in $1998$?

Number of appeared candidates from State $Q$ increased by $100 \%$ from $2006$ to $2007$. If the total number of qualified candidates from State $Q$ in $2006$ and $2007$ together is $408$,what is the number of appeared candidates from State $Q$ in $2006$?

The total population of a village is $5000$. The number of males and females increases by $10\%$ and $15\%$ respectively,and consequently,the population of the village becomes $5600$. What was the number of males in the village?

The price of an article is cut by $20 \%$. To restore it to its original price,the new price must be increased by: