Spectrum #62: Order these species by chromosomes — the solution
The Spectrum puzzle from October 15, 2026: six things on one hidden scale, fewest to most, with every figure and where the checks were best spent.
The puzzle
Order these species by chromosomes, fewest at the top and most at the bottom. The board opened in this order:
- Human
- Adder's-tongue fern
- Horse
- Fruit fly
- Cat
- Dog
Nothing was in its place; Adder's-tongue fern opened 4 places from home.
The walkthrough
The ends first. Fruit fly is the fewest of the six at 8 and Adder's-tongue fern the most at 1,260. Anchor those and the middle four are what is left to place.
Where the scale splits. The widest gap is between Dog (78) and Adder's-tongue fern (1,260) — 1,182 apart. Everything above that line belongs on the fewest side and everything below it on the most side, so sorting the six into those two groups is most of the puzzle.
The closest call. Cat (38) and Human (46) are only 8 apart — the pair that is a coin flip without the figures, and the place to spend a check: a check locks whatever is already right and leaves only the wrong tiles to swap.
The answer
| # | Fewest to Most | Figure |
|---|---|---|
| 1 | Fruit fly | 8 |
| 2 | Cat | 38 |
| 3 | Human | 46 |
| 4 | Horse | 64 |
| 5 | Dog | 78 |
| 6 | Adder's-tongue fern | 1,260 |
Previous: Spectrum #61 (Wed, Oct 14) · Next: Spectrum #63 (Fri, Oct 16) · All Spectrum solutions
About Spectrum
Spectrum is Noggin’s daily ordering puzzle: six things, one hidden scale, three checks. Tiles in the right place lock green; the figures turn over when the board is done. How to play Spectrum, or play today’s.