Greatest common factor explained | Factors and multiples | Pre-Algebra | Khan Academy
Here's a nice explanation of least common factor (or least common divisor) along with a few practice example exercises. Let's roll. Practice this lesson yourself ...
Answer
24 can be divided by:
1,2,3,4,6,8,12,24
30 can be divided by:
1,2,3,5,6,10,15,30
The GCF : 6
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