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

🧠 Explanation (Math):

Given: Buys at 6 for Rs.1; gain 20%; how many for Rs.1 to sell?
Step 1: Cost per toffee = 1/6 rupee
Step 2: Desired SP per toffee = (1/6) × 1.20 = 1/5 rupee
Step 3: Number per rupee = 1 ÷ (1/5) = 5
Final Answer: 5