Frankfurt UAS, KMITL, VGU & SPbGUT - Combinatorics & Number Theory

Problems

	Name	Solved / Tries	Average tries	Average tries to solve
A	Goldbach's Conjecture	34/118 (29%)	2.46	2.03
B	Prime Spiral	7/9 (78%)	1.29	1.29
C	Prime Path	7/8 (88%)	1.14	1.14
D	How many 0's?	7/18 (39%)	1.80	1.86
E	Divisible Subsequences	4/8 (50%)	1.60	1.75
F	Number Sets	4/8 (50%)	1.60	1.75
G	Rational Arithmetic	11/46 (24%)	3.54	3.45
H	Gears in Action	2/4 (50%)	2.00	2.00
I	Fundamental Neighbors	7/24 (29%)	2.67	2.29
J	Three Powers	9/11 (82%)	1.22	1.22
K	Factovisors	6/47 (13%)	4.70	3.50
L	Perfect Pth Powers	8/93 (9%)	5.81	5.75
M	Fractional Lotion	9/11 (82%)	1.22	1.22
N	Chinese Remainder	4/29 (14%)	4.83	4.25
O	Prime Reduction	5/23 (22%)	3.29	1.60
P	Primal Representation	9/52 (17%)	4.00	4.11
Q	Inverse Factorial	11/35 (31%)	2.06	1.73
R	Cantor	4/11 (36%)	2.75	2.75
S	Interesting Integers	3/3 (100%)	1.00	1.00
T	How Many Digits?	17/62 (27%)	2.70	2.35
U	A List Game	14/18 (78%)	1.29	1.29
V	Granica	4/10 (40%)	2.00	2.25
W	Name That Permutation	2/26 (8%)	5.20	2.50
X	Hogwarts	1/1 (100%)	1.00	1.00
Y	Power Eggs	2/5 (40%)	2.50	2.50
Z	Uniform Subtrees	1/1 (100%)	1.00	1.00
AA	S-Nim	0/0 (0%)	--	--
AB	Code Permutations	1/1 (100%)	1.00	1.00
AC	Rhombinoes	1/13 (8%)	6.50	1.00
AD	Domino	0/0 (0%)	--	--
AE	Kitchen Combinatorics	2/2 (100%)	1.00	1.00
AF	Zapis	1/1 (100%)	1.00	1.00
AG	Honeycomb Walk	7/7 (100%)	1.00	1.00
AH	Cat Coat Colors	1/1 (100%)	1.00	1.00
AI	Blocks on Blocks	0/0 (0%)	--	--
AJ	Boastin' Red Socks	1/16 (6%)	16.00	16.00
AK	Bachet's Game	5/10 (50%)	1.67	1.20
AL	Ticket Lottery	3/14 (21%)	3.50	3.33