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BrainTwister #14: Factor graphs

Can you solve this week’s logic puzzle? Plus our quick quiz and the answer to last week’s problem

By Bethan Ackerley and Katie Steckles

3 April 2024

3D illustration, brain shaped maze. Concept image of study and brain behavior.; Shutterstock ID 2177110871; purchase_order: -; job: -; client: -; other: -

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#14 Factor graphs

Set by Katie Steckles

To construct a factor graph, we dot numbers around a page and draw lines between pairs where one is divisible by the other. Start by writing the numbers 1 and 2, and join them with a line – since 2 is divisible by 1. Then write 3 and join it only to 1 (since 3 is divisible by 1 but not 2). The number 4 would connect to 1 and 2 but not 3, and so on. The connecting lines need not be straight.

Can you continue adding numbers and connecting them to…

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