ARITHMETIC(6)       UNIX Programmer's Manual        ARITHMETIC(6)

NAME
     arithmetic - provide drill in number facts

SYNOPSIS
     /usr/games/arithmetic [ +-x/ ] [ range ]

DESCRIPTION
     _A_r_i_t_h_m_e_t_i_c types out simple arithmetic problems, and waits
     for an answer to be typed in.  If the answer is correct, it
     types back "Right!", and a new problem.  If the answer is
     wrong, it replies "What?", and waits for another answer.
     Every twenty problems, it publishes statistics on correct-
     ness and the time required to answer.

     To quit the program, type an interrupt (delete).

     The first optional argument determines the kind of problem
     to be generated; +, -, x, and / respectively cause addition,
     subtraction, multiplication, and division problems to be
     generated.  One or more characters can be given; if more
     than one is given, the different types of problems will be
     mixed in random order; default is +-

     _R_a_n_g_e is a decimal number; all addends, subtrahends, differ-
     ences, multiplicands, divisors, and quotients will be less
     than or equal to the value of _r_a_n_g_e.  Default _r_a_n_g_e is 10.

     At the start, all numbers less than or equal to _r_a_n_g_e are
     equally likely to appear.  If the respondent makes a mis-
     take, the numbers in the problem which was missed become
     more likely to reappear.

     As a matter of educational philosophy, the program will not
     give correct answers, since the learner should, in princi-
     ple, be able to calculate them.  Thus the program is
     intended to provide drill for someone just past the first
     learning stage, not to teach number facts _d_e _n_o_v_o.  For
     almost all users, the relevant statistic should be time per
     problem, not percent correct.

Printed 8/2/83                                                  1