ConradCHESS .. jack & jill .. logic .. IM Conrad Goodman
jack and jill
Jack is now 7 times older than Jill.
If Jill will be half as old as Jack in 20 years from now,
how old will Jack be then?
to these solvers as of
Danny Blanco, Niven Brown, Egon Feller, Albert Frank, David Gill, Joshua Green,
Roy Harper, William Hosch, Greg Jackson, Lance Co, LW Luk, Chris Magson,
Glenn McCorkle, Adron McIntosh, Helen Moawad, Richard Newall, Valmai Osborn,
Matthew Robinson, Pierandrea Rosso, Nash Singh, Brnard Sojka, Steve Steppe,
Hennie van Jaarsveld, Luc Vingerhoets, Brend Wesseling,
Frank Womack and Brian Wood.
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