arithmetic  quiz on simple arithmetic
arithmetic [o +x/] [r range]
arithmetic asks you to solve problems in simple arithmetic.
Each question
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 endoffile 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, 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
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
typed.
bc(1), dc(1)
OpenBSD 3.6 May 31, 1993
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