21 between 13 and 34; it is the Fibonacci numbers where each successive number is the sum of the previous two.
13
232
It is 21 + 34 = 55
34. Each number is the sum of the two preceding numbers. This is called the Fibonacci Sequence.
This is a Fibonacci sequence. Each number in the sequence is the sum of the previous two numbers:3+5=85+8=138+13=2113+21=34
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
The 9th number in the Fibonacci Sequence is 34, and the 10th number in the Fibonacci sequence is 89.
8 and 34 Alterative answer: Convensionally, the Fibonacci sequence starts with two 1s. So 1 and 8 are missing.
There is no missing number. The Fibonacci sequence continues: 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, ...
34
Fibonacci sequence Fibonacci sequence
The missing number is 34. The progressive difference between the numbers doubles: 4 + 2 = 6 6 + 4 = 10 10 + 8 = 18 18 + 16 = 34 34 + 32 = 66
It is almost the Fibonacci sequence, which is 0 1 1 2 3 5 8 13 21 34 55 ...1 + 2 = 32 + 3 = 53 + 5 = 85 + 8 = 13So, the sequence is 1 2 3 5 8 13
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
There are infinitely many possible answers. If the missing number is the second in the sequence, it could be part of an arithmetic progression and so equal 10.4, or it could be in geometric progression and so would be 4, or harmonic progression which would give 1/0.65 = 1.54, approx. Furthermore, he missing number cold be the first or third in the sequence.
It is 21 + 34 = 55
The common difference is 13 because 21-8=13, 34-21=13, and 34-47=13.
34. Each number is the sum of the two preceding numbers. This is called the Fibonacci Sequence.
This is a Fibonacci sequence. Each number in the sequence is the sum of the previous two numbers:3+5=85+8=138+13=2113+21=34