What will come in the place of the question mark '?' in the following question?
$20\times 168÷14-40=?+110$

The correct option is 90.

To solve for the unknown value represented by the question mark '?', we need to simplify the given mathematical expression using the standard order of operations (BODMAS/PEMDAS rule), which dictates that Division and Multiplication must be performed before Addition and Subtraction from left to right.

The given equation is:

$20\times 168÷14-40=?+110$

Step 1: Perform the division first ($168÷14$).

$168÷14=12$

Substitute this value back into the equation:

$20\times 12-40=?+110$

Step 2: Perform the multiplication ($20\times 12$).

$20\times 12=240$

Substitute this value into the equation:

$240-40=?+110$

Step 3: Simplify the left-hand side by subtracting $40$ from $240$.

$200=?+110$

Step 4: Solve for the question mark ('?') by subtracting $110$ from both sides of the equation.

$?=200-110$

$?=90$

Thus, the value that replaces the question mark '?' is 90.