Question 8
John visits a park with his mother, who buys him a ticket for a ball-throwing game. He initially receives 12 balls. After each successful throw into the basket, he receives two more balls. John makes 20 throws altogether. How many throws went into the basket?
Editorial clarification: The worked solution assumes the game ends after John has used all the balls he receives.
Editorial clarification: The worked solution assumes the game ends after John has used all the balls he receives.