Question

What is the total volume of the smallest number of cubes that must be added to make the given figure a cuboid?

Answer 1

The given figure becomes a cuboid if it has $=4\times 3\times 2=24cubes$

The number of cubes in the given figure $=11$

$\Rightarrow$ The number of cubes must be added to make it a cuboid $=24-11=13$

$\Rightarrow$ Volume of added cubes $=13\times 2cm\times 2cm\times 2cm=104c{m}^3$