If lately you have been playing the Da Vinci Code Quest on Google, you must be answering some questions at the end of each puzzle.
I recently came across a situation where a right answer was not accepted strangely.
After I completed a "Symbol" puzzle, it asked me this question:
"How much is 2905 didot points in Inches?"
When I typed in "42.9999727", it said "Sorry, wrong answer"
hint: Try searching Google for "2905 didot points to inches" and see the result.
When I typed "43", it accepted