# A quick, one-liner riddle

I would like feedback on this riddle I made up. I would classify it with a moderately difficult rating, but I could be wrong.

Of tiny little planks from end to end when told are sharp and flat.

When moving: forward or not at all, and family to us all, at that!

Please let me know how easy it was to solve, and if you needed the hint(s).

HINT 1

plank = planck

HINT 2

family = relative

• Since this riddle is so short, it seems that most of the 'difficulty' for solving this riddle would be having them guess what you want, rather than what fits. With less information given, there becomes more possible answers. Commented May 29, 2015 at 16:18
• @MarkN I've added a second line which narrows the focus. Thanks for the advice! Commented May 29, 2015 at 16:29
• How about better grammar? That might help. It's hard to understand what you're driving at. I know it's a riddle, but the words don't actually make any sense, especially the last sentence - "at that!"??? Commented May 29, 2015 at 16:40
• @Bohemian "at that" is a common idiom meaning in addition to, besides. "it was a long wait, and an exasperating one at that" Commented May 29, 2015 at 16:46
• I think your two hints should be incorporated into the riddle itself (easy enough to do) to make it more doable and to ensure the solution is unique. Commented May 30, 2015 at 21:41

Is it

Light

Of tiny little planks from end to end when told are sharp and flat

A planck length is the minimum distance that light travels

When moving: forward or not at all

Light travels in tranverse wave

and family to us all, at that!

Reference to Einstein's theory of relativity

• But your answer always moves at a constant speed regardless of the frame of reference? Commented Aug 29, 2015 at 5:27

It's a...

Piano (or possibly referring more specifically to "ebony", as in the black keys)

Because it's referencing

Sharp and flat notes are played by playing the "black" keys on a piano, which can be thought of as tiny little boards that run all along the piano (end to end).

• I fear these answers might be better than the one I had in mind, this one in particular. I changed "boards" to "planks" to steer you in the right direction. Commented May 29, 2015 at 16:08
• This is the first thing that came to my mind as well. :) Commented May 29, 2015 at 18:56

Its clearly ...

An assorted cheddar cheese tray

Because ...

It has a bunch of sharp cheddar cheese cut into flat squares all lined up from end to end. And there are different types of cheddar that are related to each other because they are all cheese.

• HAHAHA I love it! Sorry, no. Cheddar cheese is able to move in more directions than "forward or not at all". Commented May 29, 2015 at 17:00
• Unless you are talking about how the cheese advances through time :) Commented May 29, 2015 at 17:34

quantum relativity

Here's how I reached it:

"Plank" is a pun on Max Planck - the father of quantum mechanics
"tiny little planks" refers to the planck length - the quantum of space
"when told are sharp and flat" more or less means that when observed, the wave/particle duality condenses to either a "flat" wave or a "sharp" particle
family = relative(-ity) (from hint)
movement is relative. being stationary is relative.

I think you could afford to be less obtuse.

• I would like to judge your answer at the correct one, but ironically, (given your suggestion that I be less obtuse) your answer is too broad. narrow it down a bit, and it's yours. Commented May 29, 2015 at 17:50

I think the answer is a

Book

Because:

The little boards represent the pages of the book, which is a stack of pages, from beginning to end. The single sheets are sharp (you can hurt your finger with them) and flat.

• Wow, that's actually very good. I would accept that as a secondary answer, because it fits so well. But I think the answer I had in mind fits a little bit better. Commented May 29, 2015 at 15:57

It could be a:

Song

Because:

Tiny little boards could be referring to the five lines on the staff, and when the notes of a song are "told" they can be sharp or flat.

• ah yes, but they are sharp AND flat. Commented May 29, 2015 at 16:00
• To be fair, all sharps are also flats (G-sharp is the same note as A-flat). Commented May 29, 2015 at 16:08
• @BaileyM - To be pedantic, that's only sort of true. There is actually a slight difference between a G-sharp and an A-flat. Instruments like the piano average the two as a compromise, but wind and string players as well as singers can achieve a more "perfect" harmony by being aware of the difference. Commented Mar 20, 2016 at 20:05