$\text{If }+\text{ means }-,-\text{ means }\times ,\times \text{ means }÷,÷\text{ means }+,\text{ what will come in place of the question mark }(?)\text{ in the given equation.}$

$168\times 14-8+90÷4=?$

The correct option is 10.

To solve this equation, we first need to substitute the mathematical operations according to the given rules:

• + means -
• - means ×
• × means ÷
• ÷ means +

The given equation is:

$168\times 14-8+90÷4=?$

Replacing the operators with their new meanings, we get the modified equation:

$168÷14\times 8-90+4=?$

Now, follow the BODMAS/PEMDAS rule (Brackets, Orders, Division/Multiplication, Addition/Subtraction) to solve step-by-step:

Step 1: Perform Division
Divide 168 by 14:

$168÷14=12$

Substitute this back into the equation:

$12\times 8-90+4$

Step 2: Perform Multiplication
Multiply 12 by 8:

$12\times 8=96$

Substitute this back into the equation:

$96-90+4$

Step 3: Perform Addition and Subtraction (from left to right)
Subtract 90 from 96:

$96-90=6$

Finally, add 4 to 6:

$6+4=10$

Therefore, the value that replaces the question mark (?) is 10.