2and1
what are the next 2 numbers in this sequence: 20 , 1 ,18 ,4 ,9 ,1
25 36 49 64 81 100 121 144
-20, -14, 28
18 34 66
2and1
what are the next 2 numbers in this sequence: 20 , 1 ,18 ,4 ,9 ,1
Dart Board
Two possible answers spring immediately to mind. First, this sequence appears to be a list of the first five prime numbers; in this case, the next number in the sequence would be 13. Second, the intervals between these numbers comprise the sequence "1 2 2 4", in which the nth number equals the product of the (n-1)th and (n-2)th numbers. Based on this, the next number in the given sequence would be 11 + (4*2) = 19.
114
7^2 = 49 and 8^2 = 81
possibly 16
46
The next number is 47. After this series gets going, each number is the sum of the two numbers before it. If the first two numbers were zero and 1, this would be the Fibonacci series.
The next number in the sequence would be 23. The sequence consists of prime numbers.
25 36 49 64 81 100 121 144
The series appears to be an arithmetic series in which the n'th term is 1.5 + (n - 1)2.5. If so, the next two terms are 11.5 and 14.