This activity discusses how only certain numbers can produce proper rectangles.

Students use paper and pencil.

Using Microsoft Word, students press CAPS button and use capital O. Using numbers 1-25, students should reproduce several rectangular numbers accurately on the computer. There may be more than one way for 1 number.

2 OO

5 OOOOO

or

OOO

OO

10

OOOOO

OOOOO

or

OO

OO

OO

OO

OO

1. Determine how numbers below 8 behave?

2. Find which numbers have the highest ways to make rectangles

3. Can a "cast-iron" rule be produced?

4. Is there any way to describe numbers that can not be rectangularized?

5. Use other word-processintg features (bold, italics,underline, etc.)