Answer :

The factors of 30 are:
1, 2, 3, 5, 6, 10, 15, 30

The factors of 133 are:
1, 7, 19, 133

The only common factor of 30 and 133 is 1.
well in 30's X table and 133's X table the only thing in common i see is nothing but the no 1 

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