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Q: The next number in this series 7 9 11 13 15 is?

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13

17 cause it is the next prime number

17

11

2

you are adding 2, so its 17

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

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

17, it's the sequence of primes.

13

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

9 the pattern is you subtract 3 and for the next number you add 1

21

13.

This is a list of prime numbers, the next ones are 17, 19, 23, 29

Since each number is one less than the one before it, the next number would be 8.

24

2 3 5 7 11 13 17 19 23 29 31 They are prime numbers.

the next number is 5 and the one after that is 15

This looks like a (subtract 5; add 2) series, so the next numbers are: 2, 4, -1, 1

47

24

39

71 79 95 109 The series: Sn+1 = Sn + Sum of the digits of Sn with S0 = 11

13