Answer:
1
Explanation:
The greatest common factor of two numbers is the largest number that both can divide into.
29 is a prime number. This means that it is only divisible by 1 and itself.
18 has the factors 1,2,3,6,9,18.
Only the number 1 is a shared factor between the two numbers, therefore 1 is the greatest common factor of 29 and 18.
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