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A Short introduction to using Logo. This is the first in a twelve part series.

First Forward Into Logo 10: Count up - Count Down

What happens when a procedure calls itself?

First Forward Into Logo 2: Polygons

This is the second in a twelve part introduction to Logo for beginners. In this part you learn to draw polygons.

Helen's Conjecture

Age 14 to 16 Challenge Level:

Helen made the conjecture that "every multiple of six has more factors than the two numbers either side of it". Is this conjecture true?

For example, the third multiple of 6 is 18 which has six factors (counting 1 and 18), while 17 and 19, the numbers on each side of it, have two each being prime.