Ian won …20 to Colin

Ian won $100 in the lottery. He decided to use the money to pay off debts. He paid $20 to Colin. He then paid twice as much to Helen, as he had paid to Colin. Then finally, he paid half as much to Benedict, as he had paid to Helen. How much money, in dollars, does he have left after paying off debts?

GSM8K — Grade School Math 8K (Cobbe et al., OpenAI, 2021) · train #228