Square Numbers

1.4 Square Numbers, Prime Numbers, and Composite Numbers

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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!

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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!

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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!