Question

Five roommates randy, sally, terry, uma, and vernon each do one housekeeping task mopping, sweeping, laundry, vacuuming, or dusting one day a week, monday through friday. * vernon does not vacuum and does not do his task on tuesday. * sally does the dusting, and does not do it on monday or friday. * the mopping is done on thursday. * terry does his task, which is not vacuuming, on wednesday. * the laundry is done on friday, and not by uma. * randy does his task on monday. What day does uma do her task

Answer 1

i think so it was sunday

Answer 2

We have been given a riddle.

The riddle asks us that when does Uma does her work, or more specifically on which day.  

After reading and analyzing the whole riddle it can be seen that Uma does her work on

Thursday which is to do the laundry.

Hence Thursday is the answer.