what are the two blank number? and why?
1-2-3-5-8-__-__-34
2007-04-09 11:06:31 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
1 - 2 - 3 5 - 8___-___34
The pattern is
1 + 1 = 2
2 + 1 = 3
3 + 2 = 5
5 + 3 = 8
8 = 5 = 13
13 + 8 = 21
21 + 13 = 34
- - - - - - - -s-
2007-04-09 11:51:06 · answer #1 · answered by SAMUEL D 7 · 0⤊ 0⤋
the first blank is 13 and the next is 21
you add the two previous numbers together
1+2=3
2+3=5
3+5=8
5+8=13
13+8=21
13+21=34
2007-04-09 11:12:02 · answer #2 · answered by diamond 4 · 0⤊ 0⤋
13- 21 because
1+2=3
2+3=5
3+5=8
5+8=13
8+13=21
13+21=34
2007-04-09 11:13:27 · answer #3 · answered by Daniel T 2 · 0⤊ 0⤋
You add the first two numbers to make the third, add the second and third number to make the fourth, add the third and fourth number to make the fifth... and so on.
These are very similar to Fibonachi numbers:
0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610...
The formula:
Tn = T(n-1) + T(n-2)
The missing in numbers are:
- 13 - 21
I hope that helps you!
2007-04-09 11:37:20 · answer #4 · answered by K * 1 · 0⤊ 0⤋
1-2-3-5-8-13-21-34
take 2, add 1 you get 3.
take 3, and add 2(which is the previous number) you get 5.
so if you add 5 to 8 you get 13, add 13 to 8 you get 21.
i don't know if that makes sense, but its just a repetitive pattern.
2007-04-09 11:12:33 · answer #5 · answered by Anonymous · 0⤊ 0⤋