I did not get as many correct answers to this puzzle as I had expected. Many people gave an answer which can work, but only Karan Sharma, my nephew, gave me a full answer. Other people to give any correct answer included Anisha Sharma Goyal, Anirudh Baddepudi, Mohit Khare and Abhinav Jain – Everyone – well done!

The answer is that A can give the gold coin to anyone amongst C, D, E and F. Here is an explanation to the solution:

Hope you all enjoyed the puzzle!