I enjoyed reading all the seven books of Harry Potter series.


Spoiler warning: Plot details revealed, do not read further if you intend to read the book 7.
















When Harry, Hermione and Ron break into the Gringott's bank along with Griphook, Harry gives up the Gryffindor's sword to Griphook. How did the sword return back into the Sorting Hat again for use by Neville Longbottom to kill nagini the final horcrux.

The answer is 42.
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