Mr. Verma sold his scooter for $Rs. 10500$ at a gain of $5 \%$. Find out the cost price of the scooter (in $Rs.$).

If a discount of $10 \%$ is given on the marked price of a radio,the gain is $20 \%$. If the discount is increased to $20 \%$,the gain is......$\%$

When a producer allows $36 \%$ concession on the retail price of his product,he earns a profit of $8.8 \% .$ What would be his profit percent if the concession is reduced by $24 \% ?$

$A$ person sold a horse at a gain of $15 \%$. Had he bought it for $25 \%$ less and sold it for $₹ 60$ less,he would have made a profit of $32 \%$. The cost price of the horse was (in $₹$):

$A$ man had a certain amount with him. He spent $20\%$ of that to buy an article and $5\%$ of the remaining on transport. Then he gifted $Rs. 120$. If he is left with $Rs. 1,400$,the amount he spent on transport is (in $Rs.$)

$A$ pen was sold for a certain sum and there was a loss of $20 \%$. Had it been sold for $Rs. 12$ more,there would have been a gain of $30 \%$. What would be the profit percentage if the pen was sold for $Rs. 4.80$ more than the original selling price?