In a bowl has 2020 balls. Peter and David play ball picking game, each person alternate each other to take from 1 to 2 balls . David needs to picked before or after to: a, David takes the last ball b, David leave for Peter the last ball. Solve and explain for me!
In a bowl has 2020 balls. Peter and David play ball picking game, each person alternate each other to take from 1 to 2 balls . David needs to picked before or after to:
a, David takes the last ball
b, David leave for Peter the last ball.
Solve and explain for me!
