Jenny Blake
1. Remember how this keypad has a different arrangement of keys compared to the other two?
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2. Focusing on the keys that aren't the same in both cases, look at each key's value on this keypad, as compared to its value on the other keypads.
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3. Specifically, find their difference.
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4. Then list those differences. 7 on this keypad stands in the place of 1 on other keypads, 8 in 2's place, 9 in 3's place, 1 in 7's place, 2 in 8's place, 3 in 9's place.
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5. In each case, the difference is 6.
(SOLUTION FOLLOWS)
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6. Type 666666.