What will come in the place of '?' in the following equation, if '+' and '−' are interchanged and '×' and '÷' are interchanged?
66 × 11 − 26 + 3 ÷ 9 = ?

The correct option is 5.

Given Equation:

$66\times 11-26+3÷9=?$

Interchange Rules:

1. The signs $+$ and $-$ are interchanged with each other.

2. The signs $\times$ and $÷$ are interchanged with each other.

Step-by-Step Calculation:

Substituting the new signs into the given equation, we get:

$66÷11+26-3\times 9=?$

Now, solve the equation following the BODMAS rule (Brackets, Orders, Division, Multiplication, Addition, Subtraction):

Step 1: Perform Division

$66÷11=6$

The equation becomes:

$6+26-3\times 9$

Step 2: Perform Multiplication

$3\times 9=27$

The equation becomes:

$6+26-27$

Step 3: Perform Addition

$6+26=32$

The equation becomes:

$32-27$

Step 4: Perform Subtraction

$32-27=5$

Thus, the value that replaces '?' in the equation is 5.