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Q: The next number in the series 13 1816 21 19?

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17 cause it is the next prime number

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24, they are going up in 3's, 13, 16, 19 and 18, 21 so next number is 24.

13 18 16 21 19 24 22 27 25 ... . This series consists of adding 5 to the first number and subtracting 2 from the next number, repeating the sequence in that order.

The numbers are all prime in increasing order. The next number is 17.

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the answer will be 21

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The pattern is - 5 then +2. 2 and 4 are the next numbers in the series.

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you are adding 2, so its 17

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49 (it is an arithmetic series that adds 5 then 7 then 9 then 11 then 13)

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