arithmetic man page on 4.4BSD

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       arithmetic - quiz on simple arithmetic

       arithmetic [ -o +-x/ ] [ -r range ]

       Arithmetic asks you to solve problems in simple arithmetic.  Each ques‐
       tion must be answered correctly before going on	to  the	 next.	 After
       every  20 problems, it prints the score so far and the time taken.  You
       can quit at any time by typing the interrupt or end-of-file character.

       The options are as follows:

       -o     By default, arithmetic asks questions  on	 addition  of  numbers
	      from  0  to 10, and corresponding subtraction.  By supplying one
	      or more of the characters +-x/, you  can	ask  for  problems  in
	      addition,	 subtraction,  multiplication,	and  division, respec‐
	      tively.  If you give one of these	 characters  more  than	 once,
	      that kind of problem will be asked correspondingly more often.

       -r     If  a  range  is supplied, arithmetic selects the numbers in its
	      problems in the following way.  For addition and multiplication,
	      the  numbers  to be added or multiplied are between 0 and range,
	      inclusive.  For subtraction  and	division,  both	 the  required
	      result and the number to divide by or subtract will be between 0
	      and range.  (Of course, arithmetic will not ask you to divide by
	      0.)  The default range is 10.

       When  you  get  a  problem  wrong, arithmetic will remember the numbers
       involved, and will tend to select those numbers more often than others,
       in problems of the same sort.  Eventually it will forgive and forget.

       Arithmetic  cannot be persuaded to tell you the right answer.  You must
       work it out for yourself.

       ``What?'' if you get a question wrong.  ``Right!'' if you get it right.
       ``Please	 type  a  number.''  if arithmetic doesn't understand what you

       bc(1), dc(1)

4th Berkeley Distribution	 May 31, 1993			 ARITHMETIC(6)

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