pupate

puzzle.md

 1---
 2title: Counting by sevens
 3authors:
 4    - neale
 5debug:
 6    summary: count by sevens with 4-bit unsigned integers
 7answers: 
 8    - "0x4"
 9---
100x0
110x7
120xe
130x5
140xc
150x3
160xa
170x1
180x8
190xf
200x6
210xd