Another service from Omega

Format for the Submission of Xtra Credit


Use this online form to build each of your problems. After filling up all the parts of the form click on the button that says MakeThisProblem to display a window with the correct format. Add all the information in this window to your email message. Repeat this for each problem and send only one message with all the 5 problems.


To grab the contents of the window created by MakeThisProblem you can select the text with the mouse, click Edit, then Copy. Go to the end of the window where you are composing the email message and Paste the text in.

An alternative way is to click File, save as..., choose save as *text* NOT *source*, use name prob1.txt, then prob2.txt etc.. as the names of the files. After creating all the problems in this way go to your mail program and insert all these files.


Here is an example of how the email message with the submitted problems must look like:

\authorandnumber{ Charlie Brown 1 }
\problemdate{ 04/22/98 }
\partname{4 Making a Box Model }
\chaptername{16 The Law of Averages }

A coin is tossed 100 times,  The difference "twice the
number of heads - the number of tails" is like the sum of 100
draws from one of the following boxes.  Which one?

\gooditem{ A box with one 2 and one -1 }
\baditem{A box with two 1's and a 0 }
\baditem{ A box with three tickets, two of which are marked
         "three" and one of which is marked with a "tails" }
\baditem{ A box with two 1's and one -1 }
\baditem{ A box with two 1's and two 0's }

 The correct answer is:
   A box with one 2 and one -1
 Since the chance of getting 2 or -1 is the same 1/2 but
  every time heads (i.e. the number 2 is drawn) is observed
  the sum increases by 2 and every time tails (i.e. the number
  -1 is drawn) is observed the sum decreases by 1. Hence,
  the total sum will be the same as:
  "twice the number of heads - number of tails"


\authorandnumber{ Charlie Brown 2 }
  ( second problem goes here as above
  .... etc. until the last problem 

\authorandnumber{ Charlie Brown 5 }
  ... etc...

Rules of the Game

  1. Every one in the class has the oportunity to improve his/her final score by up to 20 points (5 per exam) if before each exam, 5 questions (with 5 alternatives) with their answers is emailed to my account
  2. A single email message with all the problems in the format specified in here (see above) is sent before the exam date.
  3. All problems must be chosen from the chapters included in each exam. All problems must be from different chapters except in Exam1 where there should be 3 problems from different parts of chapter 5. Whenever possible there should be problems form chapters (from third Edition): 5,10,11,12,15,20,21,23,26,27,28.
  4. The problems must be original. By this I mean that the problems must not be in the textbook or already online or done by another classmate nor obtainable from these by changing some words or just the numbers involved.
  5. Each one of the 5 problems must have a solution and the solution must be correct.
  6. Each problem must have exactly 5 choices and one and ONLY one of the 5 choices must be the correct answer.
  7. Each problem must include the Chapter number and name from the book and the Part number and name from within the chapter. . In other words the form for each problem must be totally filled up.
  8. All problems must use the notation in the textbook.
  9. Failing to comply with any of the rules stipulated here, (even if it is so for only one of the 5 problems), would be enough to loose all the extra 5 points for the corresponding exam.
  10. Final Score = ((sum of best 3 out of 4 exams)+(total xtra credit))/3

Carlos Rodriguez <>
Last modified: Thu Sep 28 13:49:31 EDT 2000