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Human Counting Machine

Reference for Teachers

Completed Secret Code Table

 Number 
   16  
   8  
   4  
   2  
   1  
  Secret Code 
0





1



x
                               1
2


x
                       2
3


x
 x
                        2     1
4

x

                4
5

x
x
                 4            1
6

x
 x
                4     2
7

x
 x
 x
                 4     2     1
8
x


         8
9
x

x
          8                   1
10
x
x
         8            2
11
x
x
 x
          8            2     1
12
x
 x

         8     4
13
x
 x
x
          8     4            1
14
x
 x
 x
         8     4     2
15
x
 x
 x
 x
          8     4     2     1 
16
 x



16
17
 x


x
 16                          1
18
 x

x
16                   2
19
 x

x
 x
 16                   2     1
20
 x
x

16            4
21
 x
x
x
 16            4            1
22
 x
x
 x
16            4     2
23
 x
x
 x
 x
 16            4     2     1
24
 x
 x


16     8
25
 x
 x

x
 16     8                   1
26
 x
 x
x
16     8            2
27
 x
 x
x
 x
 16     8            2     1
28
 x
 x
 x

16     8     4
29
 x
 x
 x
x
 16     8     4            1
30
 x
 x
 x
 x
16     8     4     2   
31
 x
 x
 x
 x
 x
 16     8     4     2     1 

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