-20 and 2
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18
The factors of 18 are: 1, 2, 3, 6, 9, 18The factors of 40 are: 1, 2, 4, 5, 8, 10, 20, 40The common factors are: 1, 2The Greatest Common Factor (GCF) is: 2
2 times -20 equals 40 and 2 plus -20 equals -18
To find the average you need to add the two numbers together and divide by two. 18 + 22 = 40 40 / 2 = 20 The answer is 20.
factors of 18 - 1, 2, 3, 6, 9,18 factors of 200 - 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200