Sorry in advance if this is not an appropriate thread for this site, but I have seen some similar posts in the past that have garnered quite a bit of discussion.
So my question is pretty simple. I transferred to my school from a community college and was quickly able to complete my BS requirements for applied mathematics, including a "specialization" in computation. Since that time I have been taking graduate courses (my school has a program that allows "advanced" undergraduates who complete the terminal MA requirements before graduation to simultaneously obtain their BS/MA degrees), and have really been enjoying them so far.
The graduate courses I am taking constitute the core sequences in analysis, differential equations, and numerics/computation. Each sequence has an associated qualifying exam (there are others, like algebra and geometry of course, but I am not so interested in these). The qualifying exams have a reputation of being extremely difficult, especially the analysis qual where there have been several instances in which no graduate students passed on a given exam opportunity. Despite this, the exams are archived, and it is possible (with the proper time investment) to adequately prepare for them. If I was to take the time to do so, I would sacrifice much of my summer, but I feel strongly motivated to do so. Particularly because I will be applying to graduate school only a couple of months after taking (and hopefully passing) them.
Long question put succinctly: Is the time investment required to prepare for various qual exams in one's field of interest worth it (as an undergrad) in terms of the payoff of impressing adcoms to various graduate schools? Or will they in general simply not give a damn?