r
1..................7.8.9......................3..................8
2..................1.2.3.4....................4..................3
3..................2.3.4.5.6.7................6..................6
4..................1.2.3.4.5.6................6..................5
5..................4.5.6.7.8..................5..................7
6..................1.2.3......................3..................2
7..................2.3.4.5....................4..................4
8..................1.2.3.4.5.6.7.8.9..........9..................8
9..................1.2.3.4....................4..................3
10..................3.4.5.6.7.8................6..................7
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Total 50

PROBLEM 3. Alternately the first mechanism at the left and the
first at the right end of the group

Doors No. of No. of
Settings open doors open right door
1..................5.6.7......................3..................5
2..................5.6.7......................3..................7
3..................1.2.3.4.5.6................6..................1
4..................1.2.3.4.5.6................6..................6
5..................4.5.6.7.8..................5..................4
6..................4.5.6.7.8..................5..................8
7..................2.3.4.5....................4..................2
8..................2.3.4.5....................4..................5
9..................3.4.5.6.7.8.9..............7..................3
10..................3.4.5.6.7.8.9..............7..................9
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Total 50

PROBLEM 4. Middle mechanism of the group

Doors No. of No. of
Settings open doors open right door
1..................2.3.4......................3..................3
2..................5.6.7.8.9..................5..................7
3..................1.2.3.4.5.6.7..............7..................4
4..................7.8.9......................3..................8
5..................4.5.6.7.8..................5..................6
6..................1.2.3.4.5.6.7.8.9..........9..................5
7..................1.2.3...............