Coin Transformation Puzzle: 10 Coins, 3 Days, How Many Apples?

If each coin transforms into 2 apples after one day, then after three days, each coin would have transformed into 2 * 2 * 2 = 8 apples.

So, if you add 10 coins and wait for 3 days, the total number of apples would be 10 * 8 = 80 apples.