Light Yagami/Harry Potter
The next important dilemma Light faced was... what to score in the 'highly able children' test the Dursleys had reluctantly funded. Being all of 6 years and 7 months, there were not many tests that could be used to identify and quantify his 'intelligence'.
And whatever else Light had kept a detailed record of in his previous life, the quantifying standards of gifted children was not one of them.
Just how many correctly identified words would would land him in the IQ range he wanted? How many general knowledge questions would get him into the class two grades above him? How many puzzles could a 6 year old 'highly able' child reasonably solve? What would be the accepted memory retention for someone who does not have a photographic memory but has instead trained themself up to have excellent recall?
How many codes and symbols can he solve in the given time so he won't be moved to a completely different school from Dudley's?
It was the third most challenging experience in Light's new life.