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Math Help - how can you plant 10 trees in 5 rows of 4 trees each?

  1. #1
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    Smile how can you plant 10 trees in 5 rows of 4 trees each?

    how can you plant 10 trees in 5 rows of four trees each?

    2) you have a 5-liter bucket and a 3-liter bucket and NO OTHER MEASURING device . using these buckets how can you measure out exactly 4 liters of water.
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  2. #2
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    Hello, ana1808!

    These are both classic (very old) puzzles . . .


    How can you plant 10 trees in 5 rows of four trees each?
    Plant them the shape of a five-pointed star.

    Code:
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            *    * *    *
    
                *   *
                  *
               *     *

    I'll let someone else explain the second one . . .

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  3. #3
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    Buckets

    Hello ana1808 -

    Quote Originally Posted by ana1808 View Post
    2) you have a 5-liter bucket and a 3-liter bucket and NO OTHER MEASURING device . using these buckets how can you measure out exactly 4 liters of water.
    Did anyone give you an answer to this?

    Fill the small bucket; tip it into the big bucket.

    Re-fill the small bucket; fill the big bucket from it, and now empty the big bucket away. You have one litre left in the small bucket. Tip this into the big bucket.

    Re-fill the small bucket; tip it into the big bucket, which now holds 4 litres. (Sorry about the British spelling; I couldn't bring myself to write liter. Oops! I just did!)

    Grandad
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    Delete. Sorry, didn't see other posts for some reason.
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  5. #5
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    Smile

    Quote Originally Posted by ana1808 View Post
    how can you plant 10 trees in 5 rows of four trees each?

    2) you have a 5-liter bucket and a 3-liter bucket and NO OTHER MEASURING device . using these buckets how can you measure out exactly 4 liters of water.
    I can tell u 2 right away.

    + fill up 3 gal, put it in the 5 gal
    + fill up 3 gal, fill up the 5-gal (you will have 1 gal left in 3 gal)
    + empty the 5-gal
    + pour the last gallon from the 3-gal into the 5-gal
    + fill up 3-gal, pour it into the 5-gal....

    to get 4 gallons exactly!
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