Question

81,144,225,___ ,441,576​

Answer 1

Answer:

324

Step-by-step explanation:

81 = 9^2

144 = 12^2

225 = 15^2

?

441 = 21^2

576 = 24^2

We see that the pattern is the square of the numbers of multiples of 3 (9, 12, 15, 18, 21, 24), and we see that the missing number is 18.

So the number is 18^2 = 18*18 = 324

Therefore, the number is 324