Rajeev buys goods worth $₹ 6650$. He gets a rebate of $6 \%$ on it. After getting the rebate,he pays sales tax @ $10 \%$. Find the amount he will have to pay for the goods.

In an examination,$70 \%$ of the candidates passed in English,$80 \%$ passed in Mathematics,and $10 \%$ failed in both subjects. If $144$ candidates passed in both,the total number of candidates was:

What percentage of numbers from $1$ to $70$ have squares that end in the digit $1$?

The population of a town is $123,456,789$. It increases by $10\%$ during the first year,$20\%$ during the second year,and $30\%$ during the third year. What is the average percentage increase during the three years?

If $60 \%$ of the students in a school are boys and the number of girls is $812$,how many boys are there in the school?

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