There are several puzzles on site now that follow the lines of
Make $x$ using the numbers $w$, $y$ and $z$. Only (), x, /, + and - is allowed
In my opinion, this isn't a puzzle.
We are simply applying mathematical operators to some given numbers to find a given outcome. For a start, it's trial and error, and secondly to me this just seems like maths, no puzzle involved. They also seem to me as if they could be homework questions.
There are some puzzles listed below which roughly follow the above examples layout, most haven't been received well.
- Make 24 With 7,3,7,3
- Make 12 with 1, 5, 19, 10
- Make 82 With Numbers and Dots
- Fill in the operators to make $7 \circ 8 \circ 7 \circ 7 \circ 8 \circ 3 = 100$
Though there have been some good variants of such types of puzzles. However these are variants. If someone can find a good example of such a question which isn't a variant, please link it in the comments.