22.5, 33.75, 50.625...
10
Dart Board
The first thing to notice is that all the numbers in the sequence are square numbers. 25=5x5 36=6x6 49=7x7 64=8x8 81=9x9 So the next three numbers to be squared are 10, 11 and 12. 10x10=100 11x11=121 12x12=144 Thus, the next three numbers in the sequence are 100, 121, 144 The equation for the sequence is (n+4)2
The next number in the sequence is 480
1+10 - 2 (2 is one less than 3, the next answer in the sequence) = 9. 10 + 3 - 8 (8 is one less than 9) = 5 3 + 9 - 4 = 8 etc...; so the next two numbers in the sequence will be 11 and 5.
10
It is necessary to define "next" before the question can be answered.
The next number in the sequence would be 23. The sequence consists of prime numbers.
5
6 and 10
18 34 66
10
100 200 20
11, -10, 9
14
Dart Board
-20, -14, 28