They do not show up anything. They are the first few terms of the Fibonacci sequence.
21 and 13.. 21-13=8 21+13=34 34/2 = 17,+4 = 21... 34-21 = 13
This is the Fibonacci sequence where each new number is the sum of the last two numbers. So the next numbers are: 8 + 13 = 21 13 + 21 = 34 21 + 34 = 55 34 + 55 = 89 55 + 89 = 144
55
The common difference is 13 because 21-8=13, 34-21=13, and 34-47=13.
-13 + 34 = 21
21 and 13.. 21-13=8 21+13=34 34/2 = 17,+4 = 21... 34-21 = 13
This is the Fibonacci sequence where each new number is the sum of the last two numbers. So the next numbers are: 8 + 13 = 21 13 + 21 = 34 21 + 34 = 55 34 + 55 = 89 55 + 89 = 144
55
The common difference is 13 because 21-8=13, 34-21=13, and 34-47=13.
-13 + 34 = 21
34 55 89
This is called the Fibonacci sequence. The last two numbers in the sequence are added together to produce the next. Therefore, following 8 and 13 are: 8 + 13 = 21 13 + 21 = 34 21 + 34 = 55 34 + 55 = 89 55 + 89 = 144
21 is the average of 13,16 & 34 because if you add them altogether you get 63 and you divide it by 3 because there is three numbers, you get your average.
47
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
34
The first 11 Fibonacci numbers are 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, and 55.