Seven friends agreed to send everyone a holiday card. How many postcards were sent?

Correct answer:

n =  42

Step-by-step explanation:

n=7 (71)=42

Did you find an error or inaccuracy? Feel free to write us. Thank you!

Tips for related online calculators
See also our variations calculator.
Would you like to compute the count of combinations?

You need to know the following knowledge to solve this word math problem:

Related math problems and questions: