Question 1024776
 
Question:
Can you answer this  question.
this is it.
18       5          3         1
36       7          4         2
45       6          5         3
???      3          2         1
Find the question mark. 
 
Solution:
There can be many solutions to this class of problems where no rule dictates.
As long as all four lines (or column, or otherwise) satisfy the same rule that we invent, the answer should be deemed among the correct ones.

I suggest others to provide other answers.

My solution goes along the following lines:
3(5+1)=18
4(7+2)=36
5(6+3)=45
therefore
2(3+1)=<b>8</b>