# A symmetrical number sequence

What 5-letter word does this sequence represent?

      1000                   1000
1000                 1000
1000               1000
999             999
999           999
100       100
1 1 1 1


• rot13(ZVZVP) comes to mind, but doesn't explain quite enough. Commented Oct 29, 2023 at 13:36
• @aschepler I see how you might got there, but no, not the answer I'm looking for. Commented Oct 29, 2023 at 13:51

TEETH.

The image shows a top-down view of the teeth in the lower jaw. If the numbers are represented as Roman numerals, they identify the type of each tooth:

I is for incisor;
C is for canine and
M is for molar.

And the 999? Those are pre-molars, labelled as "one before molars", that is as 1000 − 1.

• This was my first thought, though I couldn't make the connection. Commented Oct 30, 2023 at 6:04
• Good job! This is the correct answer, and you explained it as intended. Commented Oct 30, 2023 at 9:57

To me, this sounds like

minim
a musical note

A "symmetrical sequence" ought to produce a palindrome.
I can't quite make it work, but it seems like "ones in ems".

Also, the shape suggests the minimum of a graph.
And, a minim is called a 'half note' and half a sine wave (a perfect tone) is shown.

• Nice attempt, but no this is not on the right track. Commented Oct 29, 2023 at 18:29