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  Number and Math Play

Coffee Break
 
Q In your mind, follow these instructions:
  1. Beginning with a full cup of coffee, drink one-sixth of it.
  2. Pour into the cup the same amount of milk as you have just drunk of the coffee.
  3. Now drink one-third of the mixture.
  4. Pour into the cup the same amount of milk as you have just drunk of the mixture.
  5. Now drink one-half of the mixture in the cup.
  6. Pour into the cup the same amount of milk as you have just drunk of the mixture.
  7. Drink the whole cup of liquid.
  8. Have you had more milk or more coffee? How much of each have you had?

 
 
A You have had the same amount of milk as you have had coffee. The cup originally held a cup of coffee (one-sixth plus one-third plus one-half), and you have poured in the same amount of milk.

STRATEGY: Draw a picture