You need at least two numbers to find a GCF.
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Since 20 is a factor of 320, it is automatically the GCF.
The GCF is 80.
To find the greatest common factor (GCF) of 120, 320, and 440, we first need to find the prime factorization of each number. 120 = 2^3 * 3 * 5 320 = 2^6 * 5 440 = 2^3 * 5 * 11 Next, we identify the common factors among the three numbers, which are 2^3 and 5. Therefore, the GCF of 120, 320, and 440 is 2^3 * 5, which equals 40.
The greatest common factor of 45 and 320 is 5.
The common factors are: 1, 5 The Greatest Common Factor: GCF = 5