In a code, '7 3 1' means 'please pass salt', '3 9 4' means 'pass the water' and '1 4 6' means 'salt and water'. Which number stands for 'the'?

Explanation

1. 01

   'pass' is in the first two sentences: 3. 'water' is in the last two: 4.

2. 02

   The second sentence '3 9 4' leaves 9 for 'the'.

3. 03

   So 'the' is 9.