Page 154 - NUMINO Challenge_D2

Problem solving 2 If three cubes are removed from the second

1 floor, the top, front, and side views don't

change shown below.

or or

Front Front Front Front Front
Minimum: 9 Cubes Maximum: 35 Cubes
The minimum number of cubes needed: 3

2 Write the number of cubes you see from the 3 Whether there are two stacked ac
bd
front below the shapes you see from the top. cubes on and or only on
Write the number of cubes you see on the right
on the side of the shapes. First, find the shapes one of the two squares will
which have a number of cubes that is obvious.
Then, write the number of cubes in the colored depend on whether there are
squares, such that there is a least number of
cubes in total. three stacked cubes on and

or only on one of the two squares. Therefore,

there are 5 different shapes viewed from the side.

2 ways Right Side Right Side Right Side

Creative Thinking p.66~p.67

1 Write the number of cubes you see from the Right Side Right Side

front below the shapes you see from the top. 4
Write the number of cubes in each square such
that the number of cubes you need in total is
the greatest.

2 2
3231 3
32 3
32 31

Front 33 2
Right Side

The minimum number of cubes needed: 16
Number of ways: 4

Answer Key