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2, 3, 5, 9, 17, _ What is the next number in the sequence?
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Clue
INFINITY! TECHNICALLY YOU WILL NEVER REACH THE DOOR, AS YOU CAN ONLY MOVE HALF THE DISTANCE, NO MATTER HOW SMALL
33. THE PATTERN: DOUBLE THE PREVIOUS NUMBER AND SUBTRACT 1
FOUR. THE FOUR FATHERS COULD BE GRANDFATHERS AND ARE DEFINITELY SONS ALREADY
THE ANSWER IS 20! 9, 19, 29, 39, 49, 59, 69, 79, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99
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