Mathematics, 26.08.2021 23:00, itsme123427

In the course of an afternoon walk, Mr. Hooper met, consecutively, 10 friends, and every one of them was
wearing a hat. They greeted each other by tipping their
hats. Il people wearing
1. How many times was that done?
2. How many times would those hats have been lifted
if their owners had met simultaneously?
a hat.

Answers: 1

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In the course of an afternoon walk, Mr. Hooper met, consecutively, 10 friends, and every one of th...