Question
In a room with a certain number of children, each child shook hands with the rest of the children only once. The total number of handshakes is 45. How many children are there in the room?
3 m

Click button first when a symbol is required. X

In a room with a certain number of children, each child shook hands with the rest of the children only once. The total number of handshakes is 45. How many children are there in the room?