Page 164 - NUMINO Challenge_D2

Type 12-2 Coloring Solid Figures p.106~p.107 2 If each color is numbered as 1, 2, 3, 4..., at least
1 1 way, 1 way
2 1 way, 1 way 3 colors are needed.
3
3 3
2

22

1
33

2

2 ways 3 When each part is colored in the order of A, B,

3 Faces Colored 0 1 23 45 6 C, and D, the number of colors that can be used
in Red
for each part is 3, 2, 2, and 2.

Number of 1 1 22 21 1
Ways

1 1 1 1 2 2 2 10 ways DC BA

Problem solving Therefore, there are 3 2 2 2 24 ways to
color the target.
1 Number of 0 1 2 3 4
Purple Sides 4

Number of 1 1 1 1 1
Outcomes

There are five ways.

2 Number of 0 12 3 45
Black Sides

Number of 1 23 3 21
Outcomes

There are 12 ways.

Creative Thinking p.108~p.109 There are two ways to color each square: black
or white. Since there are 4 squares, the figure
1 Number of ways to color A: 4. can be colored in 2 2 2 2 16 ways.

Number of ways to color B: 3, besides the ways
used for A.
Number of ways to color C: 2, besides the ways
used for A and B.
Number of ways to color D: 2, besides the ways
used for B and C.
Therefore, there are 4 3 2 2 48 ways to
color all the parts.

Answer Key