Each of the main diagonals of this sudoku must contain the numbers
1 to 9 and each rectangle width the numbers 1 to 4.
Build gnomons that are related to the Fibonacci sequence and try to
explain why this is possible.
These gnomons appear to have more than a passing connection with
the Fibonacci sequence. This problem ask you to investigate some of
Can you explain how Galley Division works?
Can you work out the means of these distributions using numerical
An environment for exploring the properties of small groups.
Get into the exponential distribution through an exploration of its
Investigate the normal distribution
How is the length of time between the birth of an animal and the birth of its great great ... great grandparent distributed?
James and Dylan showed clear mathematical thinking to prove this
result about quadrilaterals.
Go to last month's problems to see more solutions.
A personal investigation of Conway's Rational Tangles. What were
the interesting questions that needed to be asked, and where did
We asked what was the most interesting fact that you can find out
about the number 2009. See the solutions that were submitted.
This is the second article in a two part series on the history of Algebra from about 2000 BCE to about 1000 CE.
Use this animation to explore transforms of 27 cubes in net form.