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bsdgames_2.17-19_i386 **NAME**

**arithmetic** — quiz on simple arithmetic

**SYNOPSIS**

**arithmetic** [**-o** __+-x/__] [**-r** __range__]

**DESCRIPTION**

**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 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, 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.

**DIAGNOSTICS**

“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.

**SEE** **ALSO**

bc(1), dc(1)