Well, darling, those are prime numbers. The next Prime number after 13 is 17. So, if you were paying attention in math class, you'd know that 17 is the answer you're looking for. But hey, no pressure, just trying to keep you on your toes!
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15? ================= I'm guessing this is a list of the prime numbers?
So the next number would be 17.
17
42 is the next number in this sequence. This number sequence is adding the next prime number to the last number. So 1 + 2 = 3. Then 3 + 3 = 6, 6 + 5 = 11, 11 + 7 = 18, 18 + 11 = 29. The next prime number after 11 is 13, so 29 + 13 = 42. The next numbers would be 59 (42+17), 78 (59+19), and 101 (78+23)
2 3 5 7 11 13 17 19 23 29 31 They are prime numbers.
13 or 100, what are you looking for? 100 Liz is right
the next number is 5 and the one after that is 15