21
The next number in the sequence 3-15-6-30-21 is -207.
71422315
The answer is 34. The full sequence is called the Fibonachi series. Your sequence is 3 5 8 13 21 3 + 5= 8 8 + 13 = 21 Therefore: 13 + 21 = 34
16 21 22 29
21
35
The next number in the sequence 3-15-6-30-21 is -207.
These are Fibannoci's numbers. Therefore, the 7th number is 21.
a
The next number in this sequence is 13112221.
20
7203
It is: 34
71422315
The answer is 34. The full sequence is called the Fibonachi series. Your sequence is 3 5 8 13 21 3 + 5= 8 8 + 13 = 21 Therefore: 13 + 21 = 34
16 21 22 29