What is the least common factor of 9 and 90?

To answer the question, "What is the least common factor of 9 and 90?", we will start by defining and listing factors of 9 and 90.

Factors of 9 are all the integers that when multiplied by another integer equal 9. Likewise, factors of 90 are all the integers that when multiplied by another integer equal 90.

The factors of 9 are 1, 3, and 9.

The factors 90 are 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, and 90.

When you ask, "What is the least common factor of 9 and 90?", least is the key word here. Least means smallest. Thus, the smallest or least common factor that 9 and 90 have in common is 1.

Note that all integers, such as 9 and 90, have 1 as one of its factors. Thus, the answer to the least common factor of any two integers greater than 0 will always be 1.

Now that you know the least common factor of 9 and 90, you may also be interested in knowing the greatest common factor of 9 and 90. The greatest factor 9 and 90 have in common, per the list above, is 9.

When you asked for the least common factor of 9 and 90, did you mean least common multiple? If so, the least common multiple of 9 and 90 is 90.

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