Surface area of a cube

Difficulty Standard · Set 8zdjmr

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1
A cube has sides of 4 mm. What is its surface area, in square mm?
2
A cube has sides of 3 cm. What is its surface area, in square cm?
3
A cube has sides of 6 m. What is its surface area, in square m?
4
A cube has sides of 8 mm. What is its surface area, in square mm?
5
A cube has sides of 2 cm. What is its surface area, in square cm?
6
A cube has sides of 3 m. What is its surface area, in square m?
7
A cube has sides of 6 m. What is its surface area, in square m?
8
A cube has sides of 5 cm. What is its surface area, in square cm?
9
A cube has sides of 4 m. What is its surface area, in square m?
10
A cube has sides of 5 mm. What is its surface area, in square mm?
11
A cube has sides of 12 cm. What is its surface area, in square cm?
12
A cube has sides of 9 mm. What is its surface area, in square mm?
13
A cube has sides of 10 mm. What is its surface area, in square mm?
14
A cube has sides of 11 m. What is its surface area, in square m?
15
A cube has sides of 9 m. What is its surface area, in square m?
16
A cube has sides of 4 cm. What is its surface area, in square cm?
17
A cube has sides of 11 cm. What is its surface area, in square cm?
18
A cube has sides of 2 m. What is its surface area, in square m?
19
A cube has sides of 11 m. What is its surface area, in square m?
20
A cube has sides of 10 m. What is its surface area, in square m?

What is in this set

The numbers in this set run from 2 to 12.
A careful solution takes 2 written steps on average.
The mistake this set invites most often, in 90% of the problems: the three lengths were multiplied — that is the volume; a surface area adds up the faces.
Answers are a whole number.

Drawing 240 problems from this page produced 33 different ones, 14% — so a sheet of 20 will come back to a problem you have seen — there are only so many sensible ones of this kind.

The same skill, harder or easier

We would put this in front of a grade 7 class. That is our judgement, not a standard, and it is printed here so you can disagree with it. Everything else we put in that year.