Yesterday Ethan Hunt received the following message:

Take Qantas flight number 47, leaving 11 o'clock on the 5th of April. At your destination airport use any bus with number 2, 8, 18 (or bus 18/1). You can take with you 107.8 kilograms of luggage.

What is the goal of Ethan's journey?

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    $\begingroup$ @AE I'd put it in the same category as enigmatic puzzles like this and this. Arguably it's a cryptogram, but one could also argue it's more like a riddle since all the clues point to the same answer. Never mind - the current tagging is a good compromise :-) $\endgroup$ Commented Mar 25, 2015 at 11:40
  • $\begingroup$ @randal'thor fair enough :) $\endgroup$
    – A E
    Commented Mar 25, 2015 at 11:50

1 Answer 1


Easy, easy. The goal of Ethan Hunt's journey must be



* The country Argentina is called after silver (= argentum in Latin).
* Silver has the chemical element number 47, the flight number of Ethan.
* The element silver is in group 11, period 5 (11 o'clock on April 5th)
* The electron configuration of silver is 2, 8, 18, 18, 1 per shell (bus with number 2, 8, 18 or 18/1).
* The relative atomic mass of silver is 107.8682 (107.8 kilograms of luggage)

See also


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    $\begingroup$ I'm impressed you cottoned on to this so quickly! What about "Qantas" - is that a clue pointing to the same answer? $\endgroup$ Commented Mar 25, 2015 at 10:54
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    $\begingroup$ @randal'thor: "Top silver-producing mines are Cannington (Australia)..." which is in Queensland. Maybe this is the connection. From: en.wikipedia.org/wiki/Silver#Occurrence_and_extraction $\endgroup$ Commented Mar 25, 2015 at 13:21

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