I came across a question:
If j is divisible by 12 and 10, is it divisible by 24 ?
The example draws the following factor tree which I agree with
But then it states that
There are only two 2's that are definitely in the prime factorization of j. because the 2 in the prime factorization in 10 maybe redundant.That is it may be the same 2 as one of the 2's in the prime factorization of 12.
My question is what does " That is it may be the same 2 as one of the 2's in the prime factorization of 12. " mean ?
Edit: Can we consider it this way "Since the 2s have already been accounted for in 12 of the first figure there is no need to consider the 2s from the second figure in the final figure - in short the final figure is a union of both"