50.
Fit the quadratic Un = 6.5n2 - 16.5n + 12
21
21
22
21. Add the last 2 numbers to get the next.
The answer is 21.Your numerical series is the beginning of a mathematical sequence called Fibonacci Numbers.The first number of the sequence is 0, the second number is 1, and each subsequent number is equal to the sum of the previous two numbers of the sequence itself (i.e. 0, 1, 1, 2, 3, 5, 8, 13, 21, etc.).
To get the next number in the sequence, you simply multiply by 26*2=1212*2=2424*2=4848*2=96
These are Fibannoci's numbers. Therefore, the 7th number is 21.
It is 21 + 34 = 55
The next number in the sequence is 27.
34. Each number is the sum of the two preceding numbers. This is called the Fibonacci Sequence.
21. This is the Fibonacci series.
3,5,8,13 is followed by 21. 1,1,2,3,5,8,13,21,34,55,... is the Fibonacci series or Fibonacci sequence where the next number in the sequence is the sum of the last two numbers (1+1=2, 1+2=3, 2+3=5, etc.)