J.A.H.Hunter
Entertaining Mathematical Teasers, p 94
Dover Publications, 1983
H=2, E=7, A=8, R=5, T=6, O=3, S=9, C=1.
71493506
J.A.H.Hunter
Entertaining Mathematical Teasers, p 94
Dover Publications, 1983
H=2, E=7, A=8, R=5, T=6, O=3, S=9, C=1.
71493506