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New posts in recreational-mathematics
How can a piece of A4 paper be folded in exactly three equal parts?
geometry
recreational-mathematics
Proving you *can't* make $2011$ out of $1,2,3,4$: nice twist on the usual
recreational-mathematics
Where is the flaw in this "proof" that 1=2? (Derivative of repeated addition)
calculus
recreational-mathematics
fake-proofs
faq
Is this sufficient condition for infinite number generation from a finite seed also a necessary one?
number-theory
elementary-set-theory
recreational-mathematics
Product of $k$ factors as linear combination of linear combinations of its factors that are raised to the power of $k$
linear-algebra
polynomials
galois-theory
recreational-mathematics
"Integral Milking"
integration
definite-integrals
soft-question
recreational-mathematics
big-list
Can you answer my son's fourth-grade homework question: Which numbers are prime, have digits adding to ten and have a three in the tens place?
elementary-number-theory
recreational-mathematics
What is the maximum volume that can be contained by a sheet of paper?
geometry
optimization
recreational-mathematics
volume
The Mathematics of Tetris
recreational-mathematics
problem-solving
packing-problem
parity
invariance
Calculating the length of the paper on a toilet paper roll
calculus
integration
summation
recreational-mathematics
"The Egg:" Bizarre behavior of the roots of a family of polynomials.
abstract-algebra
complex-analysis
algebraic-geometry
numerical-methods
recreational-mathematics
How long will it take Marie to saw another board into 3 pieces?
algebra-precalculus
recreational-mathematics
Visually stunning math concepts which are easy to explain
soft-question
recreational-mathematics
education
big-list
visualization
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