Write the answer

1. Money serves as a facilitator during the exchange of goods.
2. Paying with a credit card is an example of paying with cash.
3. Money as means of payment is used in international relations. This is its function of the world's money.
4. Coins were invented in Russia.
5. Today paying with a credit card is becoming less and less popular.

Write the numbers without gaps or commas in increasing order.

Answer: the correct options are [ ].