If you are wrong, the punishment is the subtraction of the number from your total accumulated points. If you let the number slip by and are wrong, only 1 point is subtracted from your total.

1) Enter a seed between 1 and 100000 and press A.
2) With a printer, the divisor is printed, otherwise displayed for about 3 seconds.
3) When the number is displayed, decide if its divisible by the divisor and press and hold down R/S if you think it is. If you stop the program, press E to continue.
4) With a printer, your current score will be printed, otherwise it will be shown in the display and the calculator will stop. Press R/S for the next number.
5) Once the 15 numbers have been shown, the calculator will print and display .11111111, followed by your total score.
6) Go to step 1 for a new game.

Program Listing. Most instructions are self-explanatory.

Line  Keycode  Instruction
00      69       OP
01      38       38
02      43       RCL
03      08       08
04      99       PRT
05      76       LBL
06      14       D
07      36       PGM
08      15       15
09      13       C
10      58       FIX
11      00       00
12      52       EE
13      22       INV
14      52       EE
15      42       STO
16      12       12
17      66       PAU
18      66       PAU
19      66       PAU
20      25       CLR
21      97       DSZ
22      00       00
23      00       00
24      00       00
25      25       CLR
26      42       STO
27      12       12
28      09       9
29      35       1/X
30      58       FIX
31      09       09
32      66       PAU
33      66       PAU
34      99       PRT
35      58       FIX
36      00       00
37      43       RCL
38      08       08
39      99       PRT
40      98       ADV
41      91       R/S
42      76       LBL
43      11       A
44      42       STO
45      09       09
46      02       2
47      00       0
48      69       OP
49      07       07
50      69       OP
51      19       19
52      25       CLR
53      36       PGM
54      15       15
55      10       E'
56      12       B
57      01       1
58      42       STO
59      10       10
60      01       1
61      00       0
62      00       0
63      42       STO
64      11       11
65      25       CLR
66      42       STO
67      08       08
68      01       1
69      05       5
70      42       STO
71      00       00
72      14       D
73      76       LBL
74      12       B
75      02       2
76      42       STO
77      10       10
78      01       1
79      00       0
80      42       STO
81      11       11
82      36       PGM
83      15       15
84      13       C
85      58       FIX
86      00       00
87      52       EE
88      22       INV
89      52       EE
90      42       STO
91      14       14
92      66       PAU
93      66       PAU
94      66       PAU
95      66       PAU
96      66       PAU
97      66       PAU
98      99       PRT
99      98       ADV
100     92       RTN
101     76       LBL
102     15       E
103     43       RCL
104     12       12
105     55       /
106     43       RCL
107     14       14
108     95       =
109     22       INV
110     59       INT
111     42       STO
112     15       15
113     29       CP
114     43       RCL
115     15       15
116     67       EQ
117     10       E'
118     43       RCL
119     12       12
120     22       INV
121     44       SUM
122     08       08
123     43       RCL
124     08       08
125     99       PRT
126     87       IFF
127     07       07
128     14       D
129     91       R/S
130     14       D
131     76       LBL
132     10       E'
133     43       RCL
134     12       12
135     44       SUM
136     08       08
137     43       RCL
138     08       08
139     99       PRT
140     87       IFF
141     07       07
142     14       D
143     91       R/S
144     14       D