Mathematics

numbers, shapes, logic · 6 items

• memory-match.md Memory Match Train your memory by finding matching pairs: emoji, colors, numbers, uppercase, or lowercase letters. Play solo or take turns with a friend.
• math-race.md Math Race A 60-second mental math quiz: add, subtract, multiply, divide, with three levels, a big numpad, streak bonus, and best score per level.
• tower-of-hanoi.md Tower of Hanoi 3D Move a tower of 3–8 discs to another peg without ever putting a big disc on a smaller one. Shows the 2ⁿ−1 minimum and animates the recursive solution.
• binary-guess.md Binary Number Guess Flip bit cards from 128 down to 1 to make a number, or read the number from the face-up cards. Three levels and a 60-second timer.
• sorting-visualizer.md Sorting Visualizer Watch bars get sorted by bubble, selection, insertion, merge and quick sort, with step counters. Race mode: guess which algorithm is faster.
• arrow-path.glb Arrow Path Place arrows on the board so the monkey reaches the banana, the rabbit the carrot, or the robot the battery. 30 logic levels for kids and grown-ups.