1. Day 1 5-Minutes

2. (Driscoll, 1999) Maria has a red candle and a green candle. Each candle is 18 centimeters long. Maria lights each candle at the same time. The red candle takes 6 hours to burn out, but the green candle takes 3 hours to burn out. After one hour of burning, which candle is longer? How much longer?

3. Day 2 5-Minutes

4. (Driscoll, 1999) Maria has a red candle and a green candle. Each candle is 18 centimeters long. Maria lights each candle at the same time. The red candle takes 6 hours to burn out, but the green candle takes 3 hours to burn out. How much time will pass until one of the candles is exactly twice as long as the other?

5. Day 3 5-Minutes

6. (Driscoll, 1999) Maria lights two candles at the same time. Each Candle is 36 centimeters long. One candle takes 3 hours to burn out and the other takes 6 hours to burn out. How much time will pass until the slower-burning candle is exactly twice as long as the faster-burning one?

7. Day 4 5-10 minutes

8. (Driscoll, 1999) Maria lights two candles of equal length at the same time. One candle takes 6 hours to burn out and the other takes 9. How much time will pass until the slower-burning candle is exactly twice as long as the faster- burning one?