One thousand unit cubes are fastened together to form a large cube with edge length 10 units; this is painted and then separated into the original cubes. What is the number of these unit cubes which have at least one face painted?
Solution
The unpainted cubes form the 
ចំលងសំនួរនិងចំលើយជាភាសាខ្មែរទុក.
Techno Charity is a charitable organization created in 2006 by engineers graduated from the Institute of Technology of Cambodia.
3 Responses
It’s nice to be at your new home!
All the best
Many thanks.
It’s still under-construction
Have a nice day
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