$25\times 8.16+{\left(24\right)}^2-?={\left(9\right)}^3$

Find the value of question (?) mark in following questions.

The correct option is 51.

To find the value of the question mark (?), let us set up the equation using the given expression:

$25\times 8.16+{\left(24\right)}^2-?={\left(9\right)}^3$

Step 1: Simplify each individual component of the equation.

First, calculate the product of 25 and 8.16:

$25\times 8.16=204$

Next, find the square of 24:

${\left(24\right)}^2=576$

Then, find the cube of 9:

${\left(9\right)}^3=729$

Step 2: Substitute these values back into the equation.

$204+576-?=729$

Step 3: Solve for the question mark (?).

Add 204 and 576 together:

$780-?=729$

Rearrange to solve for ?:

$?=780-729$

$?=51$

Therefore, the value of the question mark is 51.