Question 503687
<pre>
You can't, if they stand upright, because these six are the 
only possaibilities:

136 = 2×2×17, not divisible by 7
163 = a prime number, not divisible by 7
316 = 2×2×79, not divisible by 7
361 = 19×19, not divisible by 7
613 = a prime number, not divisible by 7
631 = a prime number, not divisible by 7.

However if the runner with the 6 stands on his or her head,
you'll have  931 which is divisible by 7 since 7×133=931.

Edwin</pre>