Look at the series of numbers in the riddle and guess the next 2 numbers in the series.
What Comes Next In The Sequence:
17, 17, 34, 20, 20, 31, 23, ?, ?
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This is an alternating subtraction series with repetition. There are two different patterns here. In the first, a number repeats itself; then 3 is added to that number to arrive at the next number, which also repeats. This gives the series 17, 17, 20, 20, 23, and so on. Every third number follows a second pattern, in which 3 is subtracted from each number to arrive at the next: 34, 31, 28.
So the next 2 numbers are: 23, 28