Faces Of F

Level 2

Nine cubes are put together to form the letter F how many faces are painted? (There are two cubes on the two horizontal lines and 5 cubes on the vertical axis)

The answer is 31.

1 solution

Tyson Szeto
Nov 19, 2018

You can count the faces here

I think there are 38 faces:

9 on the front as there are 9 cubes
9 more on the back
5 on the left as the F is 5 cubes high
5 on the right
5 on the top (3 on the upper horizontal arm and 2 on the lower arm)
5 on the bottom (2 on both arms and one that the F stands on

Henry U - 2 years, 6 months ago

seeing the top, we'd only see 3

Charles L - 2 years, 6 months ago

There are 3 that can be seen from above, but the lower arm of F also has 2 top faces

Henry U - 2 years, 6 months ago

@Henry U – Agreed, there are indeed 38 faces not 31.

A Former Brilliant Member - 2 years, 6 months ago

@A Former Brilliant Member – i think that the right answer is 34

Charles L - 2 years, 6 months ago

@Charles L – I dont know whether you are considering the bottommost face connected to ground.

A Former Brilliant Member - 2 years, 6 months ago

@Henry U – but we wouldn't see it because they'd hide with the three we see on the top arm

Charles L - 2 years, 6 months ago

@Charles L – But the problem isn't about faces we can see. We are just asked to count the number of exterior faces.

Henry U - 2 years, 6 months ago

@Henry U – If it were so, I agree with you, it would be 38

Charles L - 2 years, 6 months ago

There should be 38 faces, otherwise it might be that your question is unclear.

Lucas Tan - 2 years, 6 months ago

Faces Of F

The answer is 31.

1 solution

1 pending report

Vote up reports you agree with