8
$\begingroup$

I have an opaque 6-sided die. Without using mirrors or any other optical aids, what is the greatest number of faces of the die that I am able to see at the same time?

$\endgroup$
  • $\begingroup$ You only need to see three sides to know where all six sides are, so you can comfortably look from afar at it. I can then see the other three sides in my imagination. $\endgroup$ – poke Jan 15 '15 at 9:12
28
$\begingroup$

Due to the fact that the die is smaller than the distance between the eyes, if you hold it die very close to your face, it's possible to see 5 faces at the same time (all faces except the one opposite to you):

enter image description here

$\endgroup$
  • 6
    $\begingroup$ Technically, using some medical tools to bash one's face in, one might even be able to see all six sides :D $\endgroup$ – dmg Dec 3 '14 at 12:59
  • 12
    $\begingroup$ @dmg I'd consider it part of puzzle standard conditions that medical "enhancements" of involved creatures is not allowed. Otherwise I might as well just bash the teeth out of a certain fox in order to cross a river without it eating my chicken. $\endgroup$ – aaaaaaaaaaaa Dec 3 '14 at 13:17
  • 4
    $\begingroup$ Did you try if it is possible to see all six faces if you hold a corner towards your face? It depends on the angle between your eyes and the opposite corner of the die. With a small die and a favourably shaped skull, it might be possible even without enhancements. $\endgroup$ – JiK Dec 3 '14 at 14:38
  • 4
    $\begingroup$ @JiK I tried, it isn't very far from being possible, but it is definitely not possible with my head. $\endgroup$ – aaaaaaaaaaaa Dec 3 '14 at 16:07
  • 3
    $\begingroup$ @rumtscho It doesn't need to be all that close, there is no theoretical limit to how far away the die can be while the eyes are still on the correct side of the faces. But you'll get a better angle by holding the die closer. I get the best view around 15 cm, I can focus, and I can tell all the pips apart. $\endgroup$ – aaaaaaaaaaaa Dec 3 '14 at 21:25
21
$\begingroup$

You didn't specify the material the die can be made of. Dice made of translucent plastic are common, and you can easily see all six sides.

enter image description here

$\endgroup$
  • 2
    $\begingroup$ Nice try, but I think I covered that with the word "normal". $\endgroup$ – aaaaaaaaaaaa Dec 3 '14 at 15:12
  • 9
    $\begingroup$ I'm not sure that your usage of the word 'normal' implies that the die is opaque - usually it is taken to mean a die that is in the usual shape of a cube (if it has 6 sides). $\endgroup$ – Psychemaster Dec 3 '14 at 15:28
  • 10
    $\begingroup$ I think commercially available in thousands of stores nationwide & online qualifies as 'normal'. google.com/search?q=red+translucent+dice&tbm=shop $\endgroup$ – David Yaw Dec 3 '14 at 15:30
  • 1
    $\begingroup$ In any case, it is a question about me and my die, my die is opaque. $\endgroup$ – aaaaaaaaaaaa Dec 3 '14 at 16:09
4
$\begingroup$

If your goal is to be able to see the most number of sides of a normal opaque die without any sort of aid, whatsoever, besides your own hands and eyes, then i'd say w0lf's answer is the best.

However if your goal is to see the most amount of sides of a normal opaque die without the aid of optical tricks but by utilising other tricks, then i'd suggest simply cutting off the faces of all six sides, thinly, line them up and you will be able to see them all, with an added bonus - the insides of the die! :O

$\endgroup$
  • 5
    $\begingroup$ But then it wouldn't be a normal die $\endgroup$ – Richard Dec 3 '14 at 19:58
  • 4
    $\begingroup$ @Richard, it would be a normal die, then you cut it up into 6 tinier normal dice. But the original die was normal. :D $\endgroup$ – mathgenius Dec 3 '14 at 20:01
  • $\begingroup$ But you killed the die! $\endgroup$ – You Apr 10 '16 at 16:27

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.