rename statics/euler and sync b93 code with main repo

www/statics/euler/Euler_Problem-061_description.md

@@ -0,0 +1,21 @@
+Triangle, square, pentagonal, hexagonal, heptagonal, and octagonal numbers 
+are all figurate (polygonal) numbers and are generated by the following formulae:
+
+~~~
+Triangle        P3,n=n(n+1)/2    1, 3, 6, 10, 15, ...
+Square          P4,n=n2          1, 4, 9, 16, 25, ...
+Pentagonal      P5,n=n(3n?1)/2   1, 5, 12, 22, 35, ...
+Hexagonal       P6,n=n(2n?1)     1, 6, 15, 28, 45, ...
+Heptagonal      P7,n=n(5n?3)/2   1, 7, 18, 34, 55, ...
+Octagonal       P8,n=n(3n?2)     1, 8, 21, 40, 65, ...
+~~~
+
+The ordered set of three 4-digit numbers: `8128, 2882, 8281`, has three interesting properties.
+
+ - The set is cyclic, in that the last two digits of each number is the first two digits of the next number (including the last number with the first).
+ - Each polygonal type: triangle (`P(3,127)=8128`), square (`P(4,91)=8281`), and pentagonal (`P(5,44)=2882`), is represented by a different number in the set.
+ - This is the only set of 4-digit numbers with this property.
+
+Find the sum of the only ordered set of six cyclic 4-digit numbers for which each polygonal type: 
+triangle, square, pentagonal, hexagonal, heptagonal, and octagonal, 
+is represented by a different number in the set.