Spectrum #63: Order these brains by weight — the solution
The Spectrum puzzle from October 16, 2026: six things on one hidden scale, lightest to heaviest, with every figure and where the checks were best spent.
The puzzle
Order these brains by weight, lightest at the top and heaviest at the bottom. The board opened in this order:
- Human
- Sperm whale
- Cat
- Dolphin
- Chimpanzee
- Elephant
Dolphin was already in place; Sperm whale opened 4 places from home.
The walkthrough
The ends first. Cat is the lightest of the six at 0.06 lb and Sperm whale the heaviest at 17 lb. Anchor those and the middle four are what is left to place.
Where the scale splits. The widest gap is between Dolphin (3.5 lb) and Elephant (11 lb) — 7.5 lb apart. Everything above that line belongs on the lightest side and everything below it on the heaviest side, so sorting the six into those two groups is most of the puzzle.
The closest call. Human (3 lb) and Dolphin (3.5 lb) are only 0.5 lb 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
| # | Lightest to Heaviest | Figure |
|---|---|---|
| 1 | Cat | 0.06 lb |
| 2 | Chimpanzee | 0.85 lb |
| 3 | Human | 3 lb |
| 4 | Dolphin | 3.5 lb |
| 5 | Elephant | 11 lb |
| 6 | Sperm whale | 17 lb |
Previous: Spectrum #62 (Thu, Oct 15) · Next: Spectrum #64 (Sat, Oct 17) · 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.