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2 years ago

9

A group of 13 friends were planning a trip. On the night before they left they made a lot of phone calls. Each friend talked to

every friend at least once. What is the fewest phone calls that would have been made.

1 answer:

gavmur [86]2 years ago

6 0

I believe 156 because each person would have had to make 12 phone calls and there are 13 people so 12x13

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