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L _ N G _ R Clue
THE PROFESSOR HAS TO ADD THE REST OF THE DIGITS, FIND THE NEAREST NUMBER TO THE SUM THAT IS DIVISIBLE BY 9 AND GET THE DIFFERENCE. SO, JOHN GAVE THE NUMBER 9646 TO THE PROFESSOR. THE PROFESSOR WILL ADD THE NUMBERS (9 + 6 + 4 + 6) TO GET 25. THE NEAREST NUMBER TO 25 THAT IS DIVISIBLE BY 9 IS 27. AND THE CROSSED OUT NUMBER IS 27 - 25. THIS IS A MATHS TRICK THAT RELIES ON THE POWER OF 9 THE ROPE HAS TO BE 6.28 METERS LONGER (= 2 Π). IT DOES NOT EVEN MATTER HOW BIG THE ORIGINAL CIRCLE IS. IF YOU EXTEND THE THE RADIUS BY 1 METER, THE CIRCLE WILL ALWAYS GETS 6.28 METERS LONGER BORIS PLACED THE FLUTE DIAGONALLY IN A SUITCASE THAT MEASURED 1 METER BY 1 METER. THIS SUITCASE WAS QUITE ACCEPTABLE TO THE POSTAL OFFICIALS ITS SIDES MEASURED 1 METER. FROM CORNER TO CORNER, IT MEASURES 1.414 METERS - THE SQUARE ROOT OF TWO ANDY HAS TO USE THE SHOVEL TO CREATE A PILE OF DIRT UNDER THE WINDOW SO HE CAN CLIMB UP ONTO IT AND ESCAPE FROM THE CELL