Why it doesn't solve this?
51719
Why is Solve returning an empty list?
138896
What's up with this question?
131012
Is there no solution to the blue-eyed islander puzzle?
16959
Complete the square doesn't work here.
120719
Why isn't it $E \approx 27.642 \times mc^2$?
158179
Birthday problem: why is this solution wrong?
70774
Why can't the Schrödinger equation be solved exactly for multi-electron atoms? Does some solution exist even in principle?
155743
Why does the equation $x^2\equiv2 \pmod 5$ have no solutions?
78569
Besides the $3x + 1$ problem, for which similar problems are still unresolved regarding trayectory?
32697
How can you solve this "paradox"? Central potential
83849
What is the problem that gets worse after you try to solve it?
38745
Using Newton's Law of Universal Gravitation to find distance, with the question not giving sufficient information to substitute into the equation.
125999
When does a system of equations have no solution?
21665
why division by zero is not possible
1560
Shouldn't the harmonic series converge?
35370
Why is this proposition provable and its converse not?
50306
Why Goldbach's conjecture is difficult to prove?