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Anonymous
1 and 5.
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45: 3 5 80: 2 5
8 x 10 = 80 80 - 8 = 72 = 8 x 9
The Greatest Common Divisor (GCD) for 45 80 is 5.
They are: 1, 2, 4, 8 and 16
Eight: 45, 50, 55, 60, 65, 70, 75 and 80.