180, 376, 632, 956, 1317, 1840
Find the wrong number in the given series

The correct option is 1317.

To find the wrong number in the given series, let us analyze the differences between consecutive terms:

$376-180=196$

$632-376=256$

$956-632=324$

Notice that the differences obtained so far are squares of consecutive even numbers:

$196={14}^2$

$256={16}^2$

$324={18}^2$

Following this pattern, the next difference should be ${20}^2=400$.

Adding 400 to 956 gives:

$956+400=1356$

Checking the next term with ${22}^2=484$:

$1356+484=1840$

This matches the final term of the series, which confirms that 1356 should replace 1317.

Therefore, 1317 is the wrong number in the given series.