i learned by saying 4 or less let it rest, 5 or more raise the score.After you round everything to the right of the digit you rounded turns to zero or stay the same depending on the number.
There was 10 friends because there if you times 2/3 by 6 you get 12/18 and 10 people eat it then there is 3/18 left and after you simpfly it you get 1/6
