The sequence interval is 2 4 6 8 ( this is the difference of number). so the missing number is -1 if I'm not mistaken.
29
17, 19, 23, 29, and 31
If you mean: 41, 29, 35 and 23 then they are all prime numbers except for 35 which is a composite number.
17, 19, 23, 29, and 31
-47, -41, -35, -29, -23, -17, -11, -5, 1, etc.
29
17, 19, 23, 29, and 31
20, 21, 22, 23, 24, 25, 26, 27, 28, 29
If you mean: 41, 29, 35 and 23 then they are all prime numbers except for 35 which is a composite number.
38 20+3 = 23 23+6=29 29+9=38
17, 19, 23, 29, and 31
-47, -41, -35, -29, -23, -17, -11, -5, 1, etc.
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)
The first Prime number after 23 is 29.
23 and 29.
The first prime number after 23 is 29.
It is 23 followed by 29