My two digit number is special because adding the sum of its digits to the product of its digits gives me my original number. What could my number be?
Think of a number and follow my instructions. Tell me your answer, and I'll tell you what you started with! Can you explain how I know?
Crosses can be drawn on number grids of various sizes. What do you notice when you add opposite ends?
Think of a number... follow the machine's instructions. I know what
your number is! Can you explain how I know?
Create some shapes by combining two or more rectangles. What can
you say about the areas and perimeters of the shapes you can make?
A geometry lab crafted in a functional programming language. Ported
to Flash from the original java at web.comlab.ox.ac.uk/geomlab
Learn to write procedures and build them into Logo programs. Learn to use variables.
Write a Logo program, putting in variables, and see the effect when you change the variables.