ピーターの問題
https://twitter.com/keisei_otsuka/status/1223841916405440512 https://gyazo.com/036108b185f0c0a6c97da287883e7a81
総当りで解けばよい
code:peter.rb
(1..9).to_a.permutation { |a|
v = (a0 * 1.0 / (a1 * 10 + a2)) +
(a3 * 1.0 / (a4 * 10 + a5)) +
(a6 * 1.0 / (a7 * 10 + a8))
if v > 0.99999 && v < 1.00001
puts "#{a0}/#{a1}#{a2} + #{a3}/#{a4}#{a5} + #{a6}/#{a7}#{a8} = #{v}"
end
}