This is a "perfect fit"—a number that divides another number evenly with zero leftovers., Also known as the "Ladder Method," it acts like a "division machine" to find the GCF of large numbers quickly., In a division problem, these are the "leftovers" that indicate a number is NOT a factor., A type of number (like 2, 3, or 5) that can only be divided by 1 and itself., This specific method is often the fastest to use when dealing with very large numbers like 120 and 180., Find the GCF of 16,12 and 24, Find the GCF of 27 and 45 , Find the GCF of 60 and 90, Find the GCF of 14 and 21., Find the GCF of 16 and 32..

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