Square Numbers, Prime Numbers, and Composite Numbers

1.4 Square Numbers, Prime Numbers, and Composite Numbers

Let's learn together.

Fill in the Blank

Find the factors of 10. Write them in order.

Nice work! 10 has 4 factors. It is what we mathematicians call a COMPOSITE number.

• Any number with more than 2 factors is composite

• Composite numbers are bigger than 2!

Fill in the Blank

Now find the factors of 5. Write them in order.

Nice work! 5 only has 2 factors. It is what we mathematicians call a PRIME number.

• Any number that can only be made by 1 x itself is PRIME

• Prime numbers are bigger than 2!

Fill in the Blank

Now find the factors of 25. Write them in order.

Great work! 25 is really special. It is what we mathematicians call a SQUARE number.

• A SQUARE number has a square array! Try drawing 5x5... see the square shape?

• Square numbers are made by multiplying a digit by itself. Like 1x1. And 2x2. And 3x3... all the answers to those problems are square numbers!

• 1x1 = 1 SQUARE! 2x2=4 SQUARE! 3x3=9 SQUARE! And so on!

Multiple Select

Think about the number 8. Choose what special type of number it is below... carefully. It might be more than one!

• Prime

• Composite

• Square

Multiple Select

Think about the number 3. Choose what it is below carefully. It might be more than one!

• Prime

• Composite

• Square

Multiple Select

Think about the number 9. Choose what it is below carefully. It might be more than one!

• Prime

• Composite

• Square

Multiple Select

Think about the number 36. Choose what it is below carefully. It might be more than one!

• Prime

• Composite

• Square

Poll

How are you feeling about this math?

• Need some more practice. Can I join a small group?

• Can't wait to try it on my own!

• I think I've got it... give me a challenge!