Dogs

1. You need to find the underlying rule that unites all numbers in each set but one.

2. For this specific puzzle, treat each number's digit as a separate number.

3. Try out calculations between the digits to find the underlying rule.

4. For the first set, try adding the digits together.

5. For the second and third set, try multiplying the digits.

(PARTIAL SOLUTION FOLLOWS)

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6. In the first set, the sum of each number's digits increases by one, with one exception.

7. In the second set, the product of each number's digits is always even, with one exception.

8. In the third set, all the digits' products appear twice, except for one.

(SOLUTION FOLLOWS)

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9. Select 33, 35 and 16, then turn the dial.