arithmetic - quiz on simple arithmetic
arithmetic [-o +-x/] [-r range]
arithmetic asks you to solve problems in simple arithmetic.
must be answered correctly before going on to the next.
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
0 to 10, and corresponding subtraction. By supplying one or more
of the characters +-x/, you can ask for problems in
subtraction, multiplication, and division, respectively. 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
the numbers to be added or multiplied are between 0
inclusive. For subtraction and division, both the
and the number to divide by or subtract will be
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
and will tend to select those numbers more often
than others, in
problems of the same sort. Eventually it will forgive and
arithmetic cannot be persuaded to tell you the right answer.
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
OpenBSD 3.6 May 31, 1993
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