U N S O L V E D :
Is there an amphichiral 2-component link with linking number 8?
Read more...
Does any number appear exactly 5 times in Pascal's triangle?
Read more...
Find a method to determine whether or not any given knot is invertible.
What is the best way to cut a donut up into tetrahedra?
Read more...
Can you cut a rectangle into 3 congruent non-rectangular pieces?
Read more...
Pick a positive whole number n; if odd, replace with 3n+1, if even divide by 2, repeat ...
Are there infinitely many even perfect numbers?
Read more...
Every even number greater than 2 is the sum of 2 primes. True or false?
Read more...
