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A surprise exam (Posted on 2002-04-26) Difficulty: 3 of 5
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.)

See The Solution Submitted by levik    
Rating: 3.3333 (18 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionProblem SolutionK Sengupta2007-05-28 11:57:59
SolutionStupid Professorjonathan horvat2006-08-10 22:40:39
No SubjectRachael2006-05-18 09:50:11
No Subjectaaron2006-02-14 22:56:18
Some ThoughtsMy opinionFastJazzy2005-11-24 23:04:03
who said it had to be in class?CJ2005-06-17 02:27:22
SolutionNext week.Michael Cottle2004-12-04 04:34:00
solution and possible resolutionlone2004-12-03 07:30:11
Some ThoughtsIf I were the professor . . .Captain Paradox2004-01-04 21:15:35
If this happened to me when i was at school i would have been surprised :)ben2003-12-20 21:36:24
the solution is wrongdonnmike2003-12-03 19:07:23
re: That cannot be.Tristan2003-11-12 19:20:34
That cannot be.Brainteaser2003-11-12 03:34:54
martin gardner's write-upMarc Meyer2003-10-31 12:13:25
On Sunday eveningDacre2003-10-23 11:03:59
re(4): not trueSilverKnight2003-10-07 19:54:00
re(3): not trueGamer2003-10-07 18:16:57
re(2): You guys are forgetting something...Gamer2003-10-01 20:17:07
re: You guys are forgetting something...SilverKnight2003-10-01 18:02:46
Hints/TipsYou guys are forgetting something...Bruno2003-10-01 17:03:26
re: Indirect proofSilverKnight2003-09-30 17:24:52
Indirect proofGamer2003-09-30 17:20:40
re(2): not trueSilverKnight2003-09-30 13:17:49
re: not trueBruno2003-09-30 12:23:22
re: not truesam2003-09-06 15:46:56
not truesrikumar2003-08-29 13:23:04
i must agree to disagreemullen2003-06-21 03:28:59
re: I don't agreeChaz2003-05-03 09:08:45
I don't agreeGamer2003-04-29 12:20:52
No Subjectitduzntmatter2003-04-29 05:26:52
Liar liar!Gamer2003-04-11 13:32:52
Math Classes and SurprisesNigel Nisbet2003-02-14 10:12:44
Amendment 3...just for fun (its short)Greg2003-01-07 22:08:54
Amendment 2?Greg2003-01-07 21:59:04
Solution Amendment?Greg2003-01-07 21:42:49
ParadoxRaveen2002-11-22 03:56:29
FlawJustin Ryan Grenier2002-09-26 07:50:05
Solutionre: SurpriseHappy2002-06-28 12:47:11
SurpriseHalf-Mad2002-05-12 20:57:58
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