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New posts in recreational-mathematics
Can a piece of A4 paper be folded so that it's thick enough to reach the moon?
arithmetic
recreational-mathematics
How to entertain a crowd with mathematics? [closed]
soft-question
recreational-mathematics
Any smart ideas on finding the area of this shaded region?
geometry
recreational-mathematics
puzzle
area
Colliding Bullets
probability
random-variables
asymptotics
recreational-mathematics
What is the size of each side of the square?
geometry
circles
recreational-mathematics
problem-solving
sangaku
Big List of Fun Math Books
big-list
recreational-mathematics
Penrose's remark on impossible figures
geometry
recreational-mathematics
homology-cohomology
symmetry
Arc length contest! Minimize the arc length of $f(x)$ when given three conditions.
calculus
contest-math
recreational-mathematics
big-list
calculus-of-variations
Optimal strategy for cutting a sausage?
combinatorics
logic
recreational-mathematics
fair-division
Does multiplying all a number's roots together give a product of infinity?
recreational-mathematics
real-numbers
radicals
products
infinite-product
Intersection of chord with circle knowing the length and a point
geometry
analysis
recreational-mathematics
circles
How likely is it not to be anyone's best friend?
probability
recreational-mathematics
random-graphs
Are there infinitely many "super-palindromes"?
recreational-mathematics
palindrome
How come $32.5 = 31.5$? (The "Missing Square" puzzle.)
geometry
recreational-mathematics
fake-proofs
What is the math behind the game Spot It?
combinatorics
recreational-mathematics
card-games
Fake induction proofs
induction
recreational-mathematics
examples-counterexamples
big-list
fake-proofs
What is an example of a sequence which "thins out" and is finite?
sequences-and-series
number-theory
recreational-mathematics
education
big-list
Logic problem: Identifying poisoned wines out of a sample, minimizing test subjects with constraints
puzzle
recreational-mathematics
Predicting Real Numbers
sequences-and-series
recreational-mathematics
puzzle
axiom-of-choice
Can someone explain these strange properties of $10, 11, 12$ and $13$?
notation
recreational-mathematics
number-systems
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