Page 75 - NUMINO Challenge_D2
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Type 8-2 Unchangeable Surface Area
The following solid figure is made up of 23 cubes. How many different
cubes can be removed at a time without changing the surface area of
the solid figure?
1 How does the surface area change when the colored cube is removed from
the solid figure?
Cube That is
removed
Change in the 4 2
Surface Area
2 The solid figure that does not change its surface area even after a cube is
removed is dipped in a bucket of paint. How many colored faces does it
have?
3 If one cube is removed from the solid at a time, how many cubes can be
removed without changing the surface area?
72 NUMINO Challenge D2
The following solid figure is made up of 23 cubes. How many different
cubes can be removed at a time without changing the surface area of
the solid figure?
1 How does the surface area change when the colored cube is removed from
the solid figure?
Cube That is
removed
Change in the 4 2
Surface Area
2 The solid figure that does not change its surface area even after a cube is
removed is dipped in a bucket of paint. How many colored faces does it
have?
3 If one cube is removed from the solid at a time, how many cubes can be
removed without changing the surface area?
72 NUMINO Challenge D2
