Hi Wolfgang, Hi Aditya,

Thanks for your attention.

Unfortunately adding 

\keepblocks[question] 

the example I sent before does not work in mkiv, and changing 

location=hanging

to

alternative=hanging

does not help neither…

The error message in mkiv is:

\dostopnormalblock ...meter \c!after \par \egroup 

                                                  

<argument> ...fact that $2\times 5 = 10$. \dostopnormalblock 

                                                  \dostartnormalblock {hint}...

\dodowithpar ...dler \v!construction \endcsname #1

                                                  \csname \??constructionsto…

So I don’t know what to do if one has to use mkiv.