Page 107 - NUMINO Challenge_D2
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Type 12 -1 The Number of Ways to Color
Parts A, B, C, D, and E of the snail need to be colored using four
different colors. You don’t need to use all the colors, but the adjacent
parts need to have different colors. How many different ways are there
to color the snail?
CD E
B
A
1 Write the correct number in when coloring the parts A, B, C, D, and E
of the snail in order.
You can color part A with four colors.
Since part B is adjacent to part A, which is colored already, there are three
ways to color part B excluding the color used in part A.
Since part C is adjacent to parts A and B, which are colored already,
there is(are) way(s) to color part C.
2 Part D is adjacent to parts A and C. How many colors are there to color
part D?
3 How many colors are there to color part E?
4 Find the number of ways to color the snail using the Counting Principle.
104 NUMINO Challenge D2
Parts A, B, C, D, and E of the snail need to be colored using four
different colors. You don’t need to use all the colors, but the adjacent
parts need to have different colors. How many different ways are there
to color the snail?
CD E
B
A
1 Write the correct number in when coloring the parts A, B, C, D, and E
of the snail in order.
You can color part A with four colors.
Since part B is adjacent to part A, which is colored already, there are three
ways to color part B excluding the color used in part A.
Since part C is adjacent to parts A and B, which are colored already,
there is(are) way(s) to color part C.
2 Part D is adjacent to parts A and C. How many colors are there to color
part D?
3 How many colors are there to color part E?
4 Find the number of ways to color the snail using the Counting Principle.
104 NUMINO Challenge D2
