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First Forward Into Logo 1: Square Five

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.

The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.
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