Think about Loose Coupling | |
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Before they discontinued it, Dr Dobbs "Dr Ecco's Omniheurst Corner" was great because they had these kinds of problems -- but they were too big to be brute forced!
Brute force here is at worst 10^5. But since digit3 depends on digit1, and digit5 depends on digit4 there are only three 'loose' digits, or 10^3 possibilities. You could brute-froce the 1000 combinations on paper ;) -jack ps, you can find old Ecco columns by typing 'ecco' in the search box on ddj. In reply to Re: Simple Math Puzzle...
by jackdied
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