Sandglass

We have 2 sandglasses that one of them pours all the sands in 7 minutes and another in 11 minutes. 

How can we cook an egg in 15 minutes by using these 2 sandglasses?

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Replies

  • :)

    Smart!

  • This reply was deleted.
    • Well Done!

      That's right :)

  • The proccess of cooking egg:
    -Wash the egg
    -Pour the water on a bowl
    -Put the egg on it
    -Turn on the oven
    -Put the egg inside the water on the oven
    -Wait until boiling
    -Wait 7 minutes more that the egg be cooked
    Now, pleas tell me the answer!
    :)
This reply was deleted.