How many composite factors does 84 have?
2 Answers
Explanation:
We would need to list all the factors of
This is easier than it sounds. Factors are always in pairs, so if you know one of the pair you can divide that factor into
Half of the factors are less than
Consider the numbers from
Find the matching factors:
There are
Therefore there are
8.
The factors are 4, 6, 12, 14, 21, 28, 42, 84
Explanation:
Given
84 has a few factors, as shown:
Excluding
The number of composite factors
Method 2:
Total number of composite factors
=total number of factors - total number of prime and unclassified factors
Note: Total number of factors can be counted by multiplying the values of one added to the power of the primes.
i.e. Number of factors of