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1 .\" $NetBSD: arithmetic.6,v 1.11 2003/08/07 09:36:52 agc Exp $
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3 .\" Copyright (c) 1989, 1993
4 .\" The Regents of the University of California. All rights reserved.
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6 .\" This code is derived from software contributed to Berkeley by
7 .\" Eamonn McManus of Trinity College Dublin.
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33 .\" @(#)arithmetic.6 8.1 (Berkeley) 5/31/93
34 .\"
35 .Dd May 31, 1993
36 .Dt ARITHMETIC 6
37 .Os
38 .Sh NAME
39 .Nm arithmetic
40 .Nd quiz on simple arithmetic
41 .Sh SYNOPSIS
42 .Nm
43 .Op Fl o Ar +\-x/
44 .Op Fl r Ar range
45 .Sh DESCRIPTION
46 .Nm
47 asks you to solve problems in simple arithmetic.
48 Each question must be answered correctly before going on to the next.
49 After every 20 problems, it prints the score so far and the time taken.
50 You can quit at any time by typing the interrupt or end-of-file character.
51 .Pp
52 The options are as follows:
53 .Bl -tag -width indent
54 .It Fl o
55 By default,
56 .Nm
57 asks questions on addition of numbers from 0 to 10, and corresponding
58 subtraction.
59 By supplying one or more of the characters
60 .Ar +\-x/ ,
61 you can ask for problems in addition, subtraction, multiplication, and
62 division, respectively.
63 If you give one of these characters more than once, that kind of problem
64 will be asked correspondingly more often.
65 .It Fl r
66 If a
67 .Ar range
68 is supplied,
69 .Nm
70 selects the numbers in its problems in the following way.
71 For addition and multiplication, the numbers to be added or multiplied
72 are between 0 and
73 .Ar range ,
74 inclusive.
75 For subtraction and division, both the required result and the number to
76 divide by or subtract will be between 0 and
77 .Ar range .
78 (Of course,
79 .Nm
80 will not ask you to divide by 0.)
81 The default
82 .Ar range
83 is 10.
84 .El
85 .Pp
86 When you get a problem wrong,
87 .Nm
88 will remember the numbers involved, and will tend to select those numbers
89 more often than others, in problems of the same sort.
90 Eventually it will forgive and forget.
91 .Pp
92 .Nm
93 cannot be persuaded to tell you the right answer.
94 You must work it out for yourself.
95 .Sh DIAGNOSTICS
96 .Dq What?
97 if you get a question wrong.
98 .Dq Right!
99 if you get it right.
100 .Dq Please type a number.
101 if
102 .Nm
103 doesn't understand what you typed.
104 .Sh SEE ALSO
105 .Xr bc 1 ,
106 .Xr dc 1