67 7 + 4 = 11
11 + 8 = 19
19 + 16 = 35
35 + 32 = 67 the numbers added to the original number are doubling each time. Double the number, then subtract 3. 7X2=14-3=11
11x2=22-3=19
19x2=38-3=35
35x2=70-3=67 same result, different process.
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The first number in that series is 19. That series is part of a larger series that starts with 2.
35- 4= 31-4= 27-4= 23-4= 19-4= 15-4= 11-4= 7,3,-1....
19 23 29 31 and so on. All prime numbers
No, 19*11=209!
23