Solve for N in the expression (23 x 52) − sqrt(144) + N = 240.

First, calculate $2^3$ and $5^2$.

$$2^3 = 2 \times 2 \times 2 = 8$$ $$5^2 = 5 \times 5 = 25$$

Next, calculate their product.

$$2^3 \times 5^2 = 8 \times 25 = 200$$

Then, find the square root of 144.

$$\sqrt{144} = 12$$

The expression is $(2^3 \times 5^2) - \sqrt{144} + N = 240$.
Substitute the values:

$$200 - 12 + N = 240$$

Subtract 188 from both sides of the equation.

$$N = 240 - 188$$ $$N = 52$$

The value of $N$ is $\boxed{\text{52}}$.