product/sum guessing game

pry> opts = (1..9).to_a.product((1..9).to_a).select{|a,b| a>=b}
[15] pry(main)> opts = opts.group_by{|a,b| a*b}.values.select{|x| x.size > 1}.flatten(1)
=> [[2, 2], [4, 1], [3, 2], [6, 1], [3, 3], [9, 1], [4, 2], [8, 1], [4, 3], [6, 2], [4, 4], [8, 2], [6, 3], [9, 2], [6, 4], [8, 3], [6, 6], [9, 4]] # Pete says no
[16] pry(main)> opts.group_by{|a,b| a+b}.values.select{|x| x.size > 1}.flatten(1)
=> [[4, 1], [3, 2], [6, 1], [4, 3], [3, 3], [4, 2], [9, 1], [8, 2], [6, 4], [8, 1], [6, 3], [6, 2], [4, 4], [9, 2], [8, 3]] # Susan sas no
[17] pry(main)> opts = opts.group_by{|a,b| a+b}.values.select{|x| x.size > 1}.flatten(1)
=> [[4, 1], [3, 2], [6, 1], [4, 3], [3, 3], [4, 2], [9, 1], [8, 2], [6, 4], [8, 1], [6, 3], [6, 2], [4, 4], [9, 2], [8, 3]] # Pete says no
[18] pry(main)> opts = opts.group_by{|a,b| a*b}.values.select{|x| x.size > 1}.flatten(1)
=> [[3, 2], [6, 1], [4, 3], [6, 2], [3, 3], [9, 1], [4, 2], [8, 1], [8, 2], [4, 4], [6, 4], [8, 3], [6, 3], [9, 2]] # Susan says no
[19] pry(main)> opts = opts.group_by{|a,b| a+b}.values.select{|x| x.size > 1}.flatten(1)
=> [[6, 1], [4, 3], [6, 2], [4, 4], [3, 3], [4, 2], [9, 1], [8, 2], [6, 4], [8, 1], [6, 3], [8, 3], [9, 2]] # Pete says no 3
[20] pry(main)> opts = opts.group_by{|a,b| a*b}.values.select{|x| x.size > 1}.flatten(1)
=> [[4, 3], [6, 2], [4, 4], [8, 2], [3, 3], [9, 1], [4, 2], [8, 1], [6, 4], [8, 3], [6, 3], [9, 2]] # Susan says no 3
[21] pry(main)> opts = opts.group_by{|a,b| a+b}.values.select{|x| x.size > 1}.flatten(1)
=> [[6, 2], [4, 4], [8, 2], [9, 1], [6, 4], [3, 3], [4, 2], [8, 1], [6, 3], [8, 3], [9, 2]] # Pete says no 4
[22] pry(main)> opts = opts.group_by{|a,b| a*b}.values.select{|x| x.size > 1}.flatten(1)
=> [[4, 4], [8, 2], [9, 1], [3, 3], [6, 4], [8, 3], [4, 2], [8, 1], [6, 3], [9, 2]] # Susan says no 4
[23] pry(main)> opts = opts.group_by{|a,b| a+b}.values.select{|x| x.size > 1}.flatten(1)
=> [[8, 2], [9, 1], [6, 4], [3, 3], [4, 2], [8, 3], [9, 2], [8, 1], [6, 3]] # Pete says no 5
[24] pry(main)> opts = opts.group_by{|a,b| a*b}.values.select{|x| x.size > 1}.flatten(1)
=> [[9, 1], [3, 3], [6, 4], [8, 3], [4, 2], [8, 1], [9, 2], [6, 3]] # Susan says no 5
[25] pry(main)> opts = opts.group_by{|a,b| a+b}.values.select{|x| x.size > 1}.flatten(1)
=> [[9, 1], [6, 4], [3, 3], [4, 2], [8, 3], [9, 2], [8, 1], [6, 3]]
[26] pry(main)> opts = opts.group_by{|a,b| a*b}.values.select{|x| x.size > 1}.flatten(1)
=> [[9, 1], [3, 3], [6, 4], [8, 3], [4, 2], [8, 1], [9, 2], [6, 3]]
[27] pry(main)> opts = opts.group_by{|a,b| a+b}.values.select{|x| x.size > 1}.flatten(1)
=> [[9, 1], [6, 4], [3, 3], [4, 2], [8, 3], [9, 2], [8, 1], [6, 3]]
[28] pry(main)> opts = opts.group_by{|a,b| a*b}.values.select{|x| x.size > 1}.flatten(1)
=> [[9, 1], [3, 3], [6, 4], [8, 3], [4, 2], [8, 1], [9, 2], [6, 3]]
[29] pry(main)> opts = opts.group_by{|a,b| a+b}.values.select{|x| x.size > 1}.flatten(1)
=> [[9, 1], [6, 4], [3, 3], [4, 2], [8, 3], [9, 2], [8, 1], [6, 3]]
[30] pry(main)> opts = opts.group_by{|a,b| a*b}.values.select{|x| x.size > 1}.flatten(1)
=> [[9, 1], [3, 3], [6, 4], [8, 3], [4, 2], [8, 1], [9, 2], [6, 3]]
[31] pry(main)> opts = opts.group_by{|a,b| a+b}.values.select{|x| x.size > 1}.flatten(1)
=> [[9, 1], [6, 4], [3, 3], [4, 2], [8, 3], [9, 2], [8, 1], [6, 3]]
[32] pry(main)> opts.map{|a,b| [a,b,a+b,a*b]}
=> [[9, 1, 10, 9], [6, 4, 10, 24], [3, 3, 6, 9], [4, 2, 6, 8], [8, 3, 11, 24], [9, 2, 11, 18], [8, 1, 9, 8], [6, 3, 9, 18]]