Embedly Challenge #3

gistfile1.rb

def harmonic_sum n
	(1..n).each.inject(0) {|sum, i| sum += (1.0 / i)}
end

total_words = 2520 * harmonic_sum(900)
half = total_words / 2

sum = 0
(1..900).each do |i|
	sum += 1.0 / i
	if sum * 2520 >= half
		puts i
		break
	end
end