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**mahathir saclolo****Guest**

divide the tennis court into 5 parts

each part has 3 balls

use only 3 straight lines in dividing the tennis

there are 15 balls

**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,393

hi mahathir saclolo

Welcome to the forum.

OK line one divides into two regions.

Line two crosses line one so that you've got four regions.

So the trick now is to make the third line only cut one of these regions in two.

Hint: Put a dot where each line crosses out of the court.

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 86,666

Hi;

I do not know if I have interpreted the problem correctly. It to me is similar to a Polya problem.

**In mathematics, you don't understand things. You just get used to them.Of course that result can be rigorously obtained, but who cares?Combinatorics is Algebra and Algebra is Combinatorics.**

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