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Special Numbers

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?

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Your Number Is...

Think of a number... follow the machine's instructions. I know what your number is! Can you explain how I know?

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First Forward Into Logo 6: Variables and Procedures

Learn to write procedures and build them into Logo programs. Learn to use variables.

Crossed Ends

Stage: 3 Challenge Level: Challenge Level:1

Try drawing some of these crosses on a 100 square (a size 10 grid). The patterns may be more apparent here.

Consider using algebra to represent the relationships between the different end cells.