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Classifying Numbers

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Prime numbers like

1,3,5,7,11…

Composite numbers like

2,4,8,9,10…

Even numbers like

2,4,6,8,10…

Square numbers like

4,9,16,25,36…

Classifying Numbers

Odd numbers like

1,3,5,7,9…

Abundant numbers like

?????...

Deficient numbers like

?????...

Perfect numbers like

?????...

A proper factor is all the factors of a number besides itself.

The desert is deficient of water.

When a number is deficient that means that the sum of its proper factors is LESS than itself.

Deficient: Shortage of something, less amount.

When a number is perfect that means that the sum of its proper factors is EQUAL to itself.

Perfect: Exact or equal amount of something

Abundant: A lot of something, a greater amount

When a number is abundant that means that the sum of its proper factors is GREATER than itself.

The forest is abundant with trees.

Choosing 6 would be an okay move. Why?

How would you classify these numbers if one is deficient, one is abundant, and one is perfect?

12

6

5

In which circle would 22 belong?

In which circle would 21 belong?

In which circle would 23 belong?

Go find out which numbers 2-49 are abundant, deficient, or perfect. Justify classifying based on the sum of each number’s proper factors.

Abundant #’s

Perfect #’s

Deficient #’s