5-8-13-21-34-56-90.... The next number is the sum of the two previous numbers. This is the Fibonacci sequence, 1-1-2-3-5-8-13-21-34-56-90 etc
If you mean: 1 1 2 3 5 8 13 21 then the next number is 13+21 = 34
21
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
half of 21 = 10.5 half of 5 = 2.5 10.5 - 2.5 = 8 10.5 + 2.5 = 13 13 + 8 = 21 13 - 8 = 5
5-8-13-21-34-56-90.... The next number is the sum of the two previous numbers. This is the Fibonacci sequence, 1-1-2-3-5-8-13-21-34-56-90 etc
-21
0, 1, 1 (0+1), 2 (1+1), 3 (2+1), 5 (2+3), 8 (3+5), 13(5+8), 21 (13+8), 34 (21+13),....and so on.
2+3=53+5=85+8=1313+21=3333 is the next number in this pattern. This pattern is called a Fibonacci.
If you mean: 1 2 3 5 8 13 then the next number is 8+13 = 21
13 and 8 13 + 8 = 21 13 - 8 = 5
21 + 8 / 5 = 21 + 8/5 = 21 + 13/5 = 223/5
If you mean: 1 1 2 3 5 8 13 21 then the next number is 13+21 = 34
21
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
1+1=2 1+2=3 2+3=5 3+5=8 5+8=13 8+13=21 13+21=34 and so on. In each case, n=n becomes the next additional calculation.
half of 21 = 10.5 half of 5 = 2.5 10.5 - 2.5 = 8 10.5 + 2.5 = 13 13 + 8 = 21 13 - 8 = 5