Also stuck on this one... last thing I did was open up a terminal (with no luck). lol. res = (1..20000).to_a.map { |val| val * val * val } res.select { |a| re

Also stuck on this one... last thing I did was open up a terminal (with no luck). lol. res = (1..20000).to_a.map { |val| val * val * val } res.select { |a| res.any? { |b| (b - a) == 1729 } }