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Instructional Video3:03
Curated OER

How Do You Find the Greatest Common Factor If There are No Common Factors?

6th - 9th
Use prime factorization to find the greatest common factor of three given values. Okay. But what if there doesn't seem to be any integer that is common in all three given values? Well, then, the greatest common factor must be 1. Not sure...
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Instructional Video1:30
Curated OER

What's a Prime Number?

6th - 9th
What is a prime number? Is zero a prime number? Is one a prime number? No?! Is two a prime number? Yes. So what is the definition of a prime number? A prime number is a number that can only be divided by 1 and itself. Watch this short...