Using only 3 characters (any single digit or one of the following operators: $ +,\, -,\, \times,\, \div,\, ! $), construct an expression that evaluates to the number of seconds in 6 weeks.

  • $\begingroup$ Usual..+,-,/,!,x $\endgroup$ – Uvc Apr 30 '19 at 18:55
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    $\begingroup$ ^I added this information in to the original post. In the future, if you post questions like these, please make sure that all possible specifications are included. Thanks! :) $\endgroup$ – HTM Apr 30 '19 at 19:02
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    $\begingroup$ Thanks for clarifying the question..I am a novice to the site and hopefully improve as I go along. $\endgroup$ – Uvc Apr 30 '19 at 19:05
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    $\begingroup$ is × multiplication? $\endgroup$ – Mom344 May 1 '19 at 0:35
  • $\begingroup$ Has a correct answer been given? If so, please don't forget to $\color{green}{\checkmark \small\text{Accept}}$ it. (That indicates what the correct answer is, so there's no doubt; it also awards the successful answerer for their effort, and as an added bonus, gives you +2 rep for doing it! It's also just good etiquette for this site. You have several questions right now that seem to have good answers, and none have been accepted; please consider doing so. Thanks!) $\endgroup$ – Rubio May 7 '19 at 5:23

One answer is:

'$10!$' = 3628800 = (60*60*24*7*6)

And for fun, the original question accidentally asked to solve for 3 weeks. An argument could be made that the following works:

'$9!5$' evaluates to (9! * 5) = 1814400 = (60*60*24*7*3)

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  • $\begingroup$ I'm not entirely sure about your solution for 3 weeks, since it implicitly assumes that two numbers next to each other is multiplication, which is not always the case (concatenation is another possibility). But kudos for trying to find a way to do it! $\endgroup$ – HTM Apr 30 '19 at 19:14
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    $\begingroup$ @PiIsNot3 When an operator is involved, concatenation is hardly an option. The real problem with this solution is that it could be $9$ times the subfactorial of $5$... $\endgroup$ – Arnaud Mortier Apr 30 '19 at 20:01

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