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Exercise 5h

1. Match the following solids with their corresponding nets given below.
a. b. c. d.

i. ii. iii. iv.

2. rony glues 27 cubes together to make a large cube and paints its outer surface
blue. After the paint dries, he dismantles the large cube and observes the small

cubes. He notices that some cubes have three faces painted, some
have two, some have only one, and some have no paint at all.

a. How many small cubes have three faces painted?
b. How many small cubes have two faces painted?
c. How many small cubes have one face painted?
d. How many small cubes have no faces painted?

3. The images on the left show the original solids formed by small cubes, while the
images on the right show the solids after some cubes have been removed. How
many cubes have been removed from each of the following solids?

a. b.

c.

134 Mathematics 5