or
or
9, 36, 81, 144, ... What will be the next number of this series?
The next number in the series is 225.
The series is a sequence of perfect squares, and each number is 9 more than the square of the previous number.
9 = 3^2 36 = 6^2 81 = 9^2 144 = 12^2 225 = 15^2
Therefore, the next number in the series is 225.
