This was a relatively simple problem and many people sent me the correct solution, that includes – Anisha and Arushi Goyal (together), Piyush Maheshwari, Suman Saraf, Karan Sharma, Manjiri, Arun Kohli and Abhinav Jain. Well done all!

The answer is as follows:

F- 2, A- 8, T- 6, H- 3, E- 9, R- 7, M- 5, O- 1, L- 0, D-4

Therefore the math adds up as follows:

286397+516397=802794

The good thing is that the entire solution can be derived without any trial and error. Here is a video link to solve the puzzle, might be worth sharing with children.

Hope you all enjoyed the solution.