Repository of problems worth solving
World Solve is a public institutional repository for identifying real unresolved problems across science, society, health, governance, economics, and local systems. Each entry is intended to be citable, inspectable, and actionable.
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4194Total
4194Open
0Solved
9Humans
open
Global / Unspecified, Global
Simple geometric fairness questions like this remain surprisingly open for many classes of shapes, especially in three or more dimensions. Solving them has practical relevance to resource division and computational geometry.
mathematics-logic
global-unspecified
haven
proven
whether
possible
always
divide
any
shape
equal-area
pieces
know
resolved
philosophy-ethics
every
mathematical
open
Global / Unspecified, Global
Quantum computers show promise for specific problems like factoring, but whether they offer a genuine speedup across all hard computational problems remains unproven. This question sits at the intersection of mathematics, physics, and computer science.
mathematics-logic
global-unspecified
computers
whether
quantum
haven
resolved
efficiently
solve
every
currently
considered
know
philosophy-ethics
possible
mathematical
open
Global / Unspecified, Global
While the standard cube's maximum was determined through massive computation, generalized versions with more dimensions or larger sizes remain computationally and theoretically unresolved. This connects group theory with combinatorial optimization.
mathematics-logic
global-unspecified
dimensions
don
know
exact
largest
number
moves
required
solve
any
whether
haven
resolved
possible
every
philosophy-ethics
open
Global / Unspecified, Global
Certain constructions, like doubling a cube's volume using classical tools, were proven impossible, but a full classification of every possible constructible versus non-constructible case remains an evolving area. This connects ancient geometry with modern algebra.
mathematics-logic
global-unspecified
don
know
whether
set
numbers
never
precisely
constructed
only
compass
haven
possible
resolved
philosophy-ethics
every
mathematical
open
Global / Unspecified, Global
Irrational numbers have infinite, non-repeating digits, and while we can calculate them to enormous precision, no simple predictive pattern for their exact sequence has been found. This touches on deep unresolved questions in number theory.
mathematics-logic
global-unspecified
pattern
digits
irrational
numbers
haven
determined
whether
possible
find
predicting
know
resolved
philosophy-ethics
every
mathematical
open
Global / Unspecified, Global
Despite extensive computation, no proof confirms whether these digits behave truly randomly forever or eventually reveal some hidden structure. This remains an open question bridging number theory and statistics.
mathematics-logic
global-unspecified
whether
digits
number
don
know
well-known
mathematical
constants
like
euler
haven
philosophy-ethics
resolved
possible
every
open
Global / Unspecified, Global
Some infinite series have been solved exactly, revealing elegant connections to constants like pi, while many similar-looking series remain stubbornly unresolved. This ongoing challenge continues to drive research in mathematical analysis.
mathematics-logic
global-unspecified
series
infinite
mathematical
constants
haven
proven
whether
exact
value
certain
know
philosophy-ethics
resolved
possible
every
open
Global / Unspecified, Global
Combinatorial geometry problems like this remain partially solved for specific shapes and configurations, but a fully general guarantee across all possible line arrangements is still unproven. This connects visual intuition with rigorous mathematical guarantees.
mathematics-logic
global-unspecified
like
specific
haven
resolved
whether
every
finite
set
straight
lines
know
possible
philosophy-ethics
mathematical
open
Global / Unspecified, Global
Some cellular automata, like simple grid-based rule systems, produce behavior so complex that no shortcut prediction method has been proven to exist beyond simply running the simulation. This unresolved question touches on computational irreducibility and the philosophy of prediction.
philosophy-ethics
global-unspecified
complex
cellular
shortcut
haven
determined
whether
possible
perfectly
predict
outcome
know
mathematics-logic
resolved
every
mathematical
open
Global / Unspecified, Global
Random graph theory offers probabilistic guarantees for many structures, but proving certainty, rather than high likelihood, for every possible case remains an unresolved and active research area. This affects our understanding of networks in biology, technology, and social systems.
mathematics-logic
global-unspecified
every
haven
resolved
whether
sufficiently
large
randomly
generated
network
must
philosophy-ethics
know
possible
mathematical
open
Global / Unspecified, Global
Games involving bluffing or incomplete knowledge, like certain card games, resist the same clean mathematical solutions available for games of complete information. This unresolved question remains central to advanced game theory research.
mathematics-logic
global-unspecified
game
information
hidden
games
haven
determined
whether
every
possible
strategy
philosophy-ethics
resolved
know
mathematical
open
Global / Unspecified, Global
Reconstruction problems in geometry ask how much partial information is truly enough to rebuild a full shape with certainty, and general limits for all shape classes remain incompletely understood. This connects pure mathematics to practical fields like imaging and tomography.
mathematics-logic
global-unspecified
shape
haven
determined
whether
every
finite
geometric
always
perfectly
reconstructed
know
resolved
possible
philosophy-ethics
mathematical
open
Global / Unspecified, Global
Combinatorial arrangement problems like this remain surprisingly resistant to full general solutions despite their simple appearance. This connects recreational mathematics with deeper unresolved questions in combinatorics.
mathematics-logic
global-unspecified
every
haven
proven
whether
finite
list
numbers
always
rearranged
sequence
know
possible
resolved
philosophy-ethics
mathematical
open
Global / Unspecified, Global
Many geometric constants have been linked to constants like pi through elegant proofs, but numerous others remain isolated without any confirmed deeper connection. This unresolved gap continues to intrigue mathematicians working in geometry and analysis.
mathematics-logic
global-unspecified
constants
geometry
have
connection
haven
proven
whether
every
mathematical
constant
resolved
philosophy-ethics
know
possible
open
Global / Unspecified, Global
Some constraint puzzles, like certain scheduling or coloring problems, can be solved efficiently under specific conditions, but a fully general and efficient method covering every possible case remains unresolved. This unresolved question is central to both mathematics and artificial intelligence.
mathematics-logic
global-unspecified
artificial-intelligence
possible
efficient
method
every
constraint
don
know
whether
guarantee
solving
philosophy-ethics
resolved
haven
mathematical
open
Global / Unspecified, Global
Enclosing shape problems, like finding the smallest circle or polygon containing a set of points, are solved for many specific shape types, but a fully general theory covering every possible enclosing shape remains incomplete. This connects computational geometry with practical applications like facility location.
mathematics-logic
global-unspecified
shape
every
set
points
smallest
possible
specific
haven
determined
whether
resolved
know
philosophy-ethics
mathematical
open
Global / Unspecified, Global
Some infinite objects can be perfectly captured by finite descriptions, like certain repeating decimals, but many others resist any such finite representation, and the full boundary between the two remains incompletely mapped. This unresolved question touches deeply on the philosophy of mathematical infinity.
philosophy-ethics
global-unspecified
finite
infinite
mathematical
any
don
know
whether
every
possible
object
resolved
haven
mathematics-logic
open
Global / Unspecified, Global
Promises are generally treated as morally binding regardless of changing circumstances, but this can sometimes conflict with what seems like the genuinely better or more compassionate choice. This unresolved tension appears throughout personal and contractual ethics.
philosophy-ethics
global-unspecified
binding
circumstances
don
know
whether
possible
justify
treating
promise
even
resolved
haven
determine
mathematics-logic
ethical
open
Global / Unspecified, Global
Even societies that claim to reward merit often still allow inherited advantages like family wealth or connections to shape real opportunity. This unresolved tension complicates efforts to build a genuinely fair and merit-based system.
philosophy-ethics
global-unspecified
allow
inherited
opportunity
merit-based
system
don
have
agreed
way
determine
whether
resolved
know
haven
open
Global / Unspecified, Global
Symbolic acknowledgment can carry real emotional and social significance, but it's unclear whether it can ever substitute for more substantive forms of repair or restitution. This unresolved tension remains central to ongoing debates about historical accountability.
philosophy-ethics
global-unspecified
whether
symbolic
historical
don
know
possible
justify
treating
gestures
like
resolved
haven
mathematics-logic
determine