[" A vendor bought lemons at the rate of "6" for a rupee.How many for a rupees "],[" must he sell to gain "20%?]

A vendor bought buttons at 6 for rupee.How many for a rupee must he sell to gain 20%?

A man bought toffees at 6 for a rupee. How many toffees for a rupee must he sell to gain 50%?

Arun bought toffees at 6 for a rupee. How many for a rupee he should sell to gain 20% ?

Arun bought toffees at 6 for a rupee. How many for a rupee he should sell to gain 20% ?

A person bough articles at 30 for a rupee. How many for a rupee must to sell to gain 20% ?

A wholesaler purchased 7 hair clips for a rupee. How many for a rupee must he sell to get profit of 40%?

I loss 9 per cent by selling pencils at the rate of 15 a rupee. How many for a rupee must I sell them to gain 5 per cent?