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 A surprise exam (Posted on 2002-04-26)
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: 3.3684 (19 votes)

Comments: ( You must be logged in to post comments.)
 Subject Author Date Problem Solution K Sengupta 2007-05-28 11:57:59 Stupid Professor jonathan horvat 2006-08-10 22:40:39 No Subject Rachael 2006-05-18 09:50:11 No Subject aaron 2006-02-14 22:56:18 My opinion FastJazzy 2005-11-24 23:04:03 who said it had to be in class? CJ 2005-06-17 02:27:22 Next week. Michael Cottle 2004-12-04 04:34:00 solution and possible resolution lone 2004-12-03 07:30:11 If I were the professor . . . Captain Paradox 2004-01-04 21:15:35 If this happened to me when i was at school i would have been surprised :) ben 2003-12-20 21:36:24 the solution is wrong donnmike 2003-12-03 19:07:23 re: That cannot be. Tristan 2003-11-12 19:20:34 That cannot be. Brainteaser 2003-11-12 03:34:54 martin gardner's write-up Marc Meyer 2003-10-31 12:13:25 On Sunday evening Dacre 2003-10-23 11:03:59 re(4): not true SilverKnight 2003-10-07 19:54:00 re(3): not true Gamer 2003-10-07 18:16:57 re(2): You guys are forgetting something... Gamer 2003-10-01 20:17:07 re: You guys are forgetting something... SilverKnight 2003-10-01 18:02:46 You guys are forgetting something... Bruno 2003-10-01 17:03:26 re: Indirect proof SilverKnight 2003-09-30 17:24:52 Indirect proof Gamer 2003-09-30 17:20:40 re(2): not true SilverKnight 2003-09-30 13:17:49 re: not true Bruno 2003-09-30 12:23:22 re: not true sam 2003-09-06 15:46:56 not true srikumar 2003-08-29 13:23:04 i must agree to disagree mullen 2003-06-21 03:28:59 re: I don't agree Chaz 2003-05-03 09:08:45 I don't agree Gamer 2003-04-29 12:20:52 No Subject itduzntmatter 2003-04-29 05:26:52 Liar liar! Gamer 2003-04-11 13:32:52 Math Classes and Surprises Nigel Nisbet 2003-02-14 10:12:44 Amendment 3...just for fun (its short) Greg 2003-01-07 22:08:54 Amendment 2? Greg 2003-01-07 21:59:04 Solution Amendment? Greg 2003-01-07 21:42:49 Paradox Raveen 2002-11-22 03:56:29 Flaw Justin Ryan Grenier 2002-09-26 07:50:05 re: Surprise Happy 2002-06-28 12:47:11 Surprise Half-Mad 2002-05-12 20:57:58
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