Maria invited 4 of her friends over for a water balloon fight in the backyard. At the start of the game, Maria gave each of her friends 2 water balloons. She had one water balloon for herself. How many water balloons did they have altogether?
Matthew and his brother Shawn played swimming-pool-basketball. Each basket was worth 3 points. Matthew scored 9 points. Shawn scored 6 points. What is the total number of baskets made during this game?
Lauren and Gina's mother told her daughters they can swim in the pool for 20 minutes. First, they swam laps in the pool for 7 minutes. Then they swam underwater for one minute. Then they played water polo for 8 minutes. How much longer can they stay in the pool?