Added reference to HackerRank Fundamental Mathematics Problem 'Even Odd Query'.
Added reference to HackerRank Fundamental Mathematics Problem 'Even Odd Query'.

shivkrthakur/HackerRankSolutions,shivkrthakur/HackerRankSolutions,shivkrthakur/HackerRankSolutions,shivkrthakur/HackerRankSolutions