| Answer | Crossword Clue |
|---|---|
| vigesimal | Relating to or based on the number twenty |
| constructive | Relating to, based on, or denoting mathematical proofs that show how an entity may in principle be constructed or arrived at in a finite number of steps |
| vigesimal | based on the number twenty also VICENARY, VICESIMAL |
| vicesimal | based on the number twenty also VICENARY, VIGESIMAL |
| quinaries | of, pertaining to, or noting a numerical system based on the number 5 |
| nonary | of, pertaining to, or noting a numerical system based on the number 9 |
| quinary | of, pertaining to, or noting a numerical system based on the number 5 |
