A professor tells his class that he will give them a surprise examination sometime next week.

For our purposes, an examination is considered a "surprise" if on that day, the class is not 100% sure that they will get an examination. (If they only suspect it, the examination can still be a surprise.)

Having given the class this warning, is it still possible for the professor to give them a surprise examination next week? (Assume that he will not give them an exam if it will not be a surprise.)

the logic is flawed in a way that it permanently eliminates fri and proceeds to eliminate the rest of the week in a similar fashion.it should be kept in mind that when we try to remove thur, wed etc then we automatically bring back fri and all the remaining days to the list.hence only one day, most obivously fri, can be eliminated applying this logic. so the professor can conduct a suprise test.

Posted by srikumar on 2003-08-29 13:23:04