44
21 and 13. The pattern is t(n) = (-n4 + 10n3 - 23n2 + 38n - 12)/12
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.
answer for this quation is just simple only add two digit like 8+13=21 next will 13+21=34 ok.................
21
1 5 9 13 17 21
If you mean: 1 1 2 3 5 8 13 21 then the next number is 13+21 = 34
If you mean: 1 2 3 5 8 13 then the next number is 8+13 = 21
21 and 13. The pattern is t(n) = (-n4 + 10n3 - 23n2 + 38n - 12)/12
It is 43 because 31+12 = 43
34 55 89 etc..
55 and 89
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
It could be 31 ad 43
-17, -21 Pattern is subtract 4.
21 since the difference between each number is as in the order of the given pattern. so you add 13+8=21
21
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.