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

• Dec 8th 2008, 06:35 PM
ana1808
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.
• Dec 8th 2008, 07:55 PM
Soroban
Hello, ana1808!

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

Quote:

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

Code:

```              *         *    * *    *             *  *               *           *    *```

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

• Dec 20th 2008, 07:48 AM
Buckets
Hello ana1808 -

Quote:

Originally Posted by ana1808
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!)

• Dec 22nd 2008, 06:44 AM
superevilcube
Delete. Sorry, didn't see other posts for some reason.
• Dec 22nd 2008, 11:43 AM
Quote:

Originally Posted by ana1808
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!