Question

Fold a piece of paper in half to create two columns. Label one column "Prime" and the other column "Composite." Classify the following numbers by writing each in the correct column.

1. 12

2. 10

3. 7

4. 13

5. 25

6. 40

7. 63

8. 23

9. 39

10. 84

Answer 1

PRIME numbers (highlighted in this)

Composite numbers (highlighted in

this)

PRIME:

7

13

23

Let's stop here for a second.

WHY are 7, 13, and 23 prime?!

They ALL have only 2 factors: 1 and itself.

So these guys are prime:)

Now, composite numbers have more than 3 factors.

Here is something to remember:

ALL composite numbers are EVEN (except 2)



Odd numbers can be composite too.

For example, 25.





Okay.

Now that you understand what prime and composite numbers are,

let's start classifying!

Prime

1. 7 is prime

2. 13 is prime

3. 23 is prime

Composite:

1. 12

2. 10

3. 25

4. 40

5. 63

6.39

7.84

Now let's make sure we have everything in our columns.

Yeah! 10 numbers!

Hope this helps a little:)

Answer 2

12 is composite

10 is composite

7 is prime

13 is prime

25 is composite

40 is composite

63 is composite

23 is prime

39 is composite

84 is composite