1+1=2 : 1+2=3 : 2+3=5 : 3+5=8Therefore the next number is 8
456789
21
12110 0r 1210
3,5,8,13 is followed by 21. 1,1,2,3,5,8,13,21,34,55,... is the Fibonacci series or Fibonacci sequence where the next number in the sequence is the sum of the last two numbers (1+1=2, 1+2=3, 2+3=5, etc.)
1+1=2 : 1+2=3 : 2+3=5 : 3+5=8Therefore the next number is 8
The next number is 4, followed by -2
8 -1 then +3
The next number in the sequence is 18. It's +1, +2, +3, +4, ....
4
456789
You add two then take one. 1+2=3, 3-1=2, 2+2=4, 4-1=3. The next number is 5.
Zero
Sequence is +4 - 3 + 5 - 2 + 6 - 1 (+1 - 1)2 6 3 8 6 12 next number 11
13, 21 - it is the Fibonacci sequence
21
12110 0r 1210