Question

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

Answer 1

The CP of the vendor is 1 Rupee and to make 20% profit he must see those 6 toffes for RS.1 and 20 paise and then use unitary method if 6 toffes sold for 1.2 rupees then x toffes sold for 1 Rupee
so on solving we get answer as 5 toffees for a rupee