This is because the key mappings in the translation list in app-defaults only list the main set of number keys with a modifier of "None", so they don't work when NumLock is active. We can't remove that modifier since then holding down shift and hitting one of them would enter the number instead of doing the intended operation (!, *, (, or ) for instance).
Instead I've submitted a merge request upstream to add translations for those keys with Mod2 (aka NumLock) in the modifier list - you should be able to edit the XCalc app-defaults file on your system to do the same until a new release is published: https://gitlab.freedesktop.org/xorg/app/xcalc/-/merge_requests/11 -- -Alan Coopersmith- alan.coopersm...@oracle.com Oracle Solaris Engineering - https://blogs.oracle.com/solaris
