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Question
Which of the following numbers is co-prime?
18 and 35
Solution
Factors of 18 = 1, 2, 3, 6, 9, 18
Factors of 35 = 1, 5, 7, 35
We know that two numbers whose common factor is only 1 are called co-prime numbers.
The common factor of 18 and 35 is only 1.
Thus, these are co-prime numbers.
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