Vectors i and j form a unit square, and span 2D space. Drag and drop i' and j' to scale, rotate, and flip the unit square, and 2D space— so that the blue point falls on the red. Click solve to see how to get a (non-unique) solution, and help for more intuition.
Find the Basis
The red points are students, and the blue points are Universities. The edge weights represent how well each student would fit at each University. Highlight the set of edges that maximize the score for everyone involved. Press check to see if your matching is optimal.
Graph the Match
An interactive financial calculator for analyzing annuities, loans, bonds, and the time value of money. Adjust parameters to visualize how cash flows are accumulated and discounted in real time.
FM Calculator
Input an equation for y' in terms of x and y. The value of y' is the slope at any given point. Write a function so that, given an initial point, the particular solution passes through the two boundary conditions.
Slope Field Game
Test your reflexes by collecting as many gold coins as possible while avoiding an increasing number of lasers. Press the space bar to jump on computers, or tap while dragging to jump on mobile devices.
Laser Jump
You are the blue point trying to catch the red. Every move, a random edge is removed. Try to corner the red point before an edge is removed and the points are separated. Switch to defense mode to try and evade red, and switch to two players to play with a friend.
Catch the Point
Challenge yourself with classic games Tic Tac Toe, Connect 4 and Snake, this time in three dimensions.
The goal is to promote one of your pieces to the opposite end of the board before your opponent. Every move, a triangle can move one square up, down, left or right. Land on an opposing triangle to capture it. Try to find a path to victory while blocking your opponent.
Triangle Chess