Answer: 1
Explanation:
Factors of 14:
1, 2, 7, 14
Factors of 45:
1, 3, 5, 9, 15, 45
Factors of 90:
1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90
Common factor:
1
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