### Brain Teasers

# Making Punch

Ruby is making a bowl of punch. She needs 7 cups of water. Ruby doesn't have a measuring cup, but she has three pitchers. One pitcher holds 9 cups of water. Another pitcher holds 6 cups of water. The last pitcher holds 4 cups of water. How can Ruby measure exactly 7 cups of water with her pitchers?

### Hint

She can't just put 7 cups in the 9 cup pitcher...### Answer

Ruby can fill the pitcher that holds 4 cups. Then she can fill the 9 cup pitcher and pour the water into the 6 cup pitcher. When the 6 cup pitcher is full, the 9 cup pitcher will be left with 3 cups. Ruby still has the 4 cup pitcher filled. 3 cups with another 4 cups is 7 cups.Hide Hint Show Hint Hide Answer Show Answer

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