January 2022 - Math Problem

1 cm linking cubes are put together to form a rectangular prism that has dimensions 4 cm by 6 cm by 9 cm.  You position the prism so you can see three faces.  How many 1 cm linking cubes can you see?

Solution:

You will be able to see 96 1 cm linking cubes.  What if the prism was 5 cm by 10 cm by 15 cm?

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