What will come in place of the question mark (?) in the following equation, if ‘+’ and ‘−’ are interchanged and ‘×’ and ‘÷’ are interchanged? 28 + 125 × 5 − 12 ÷ 3 = ?

Given expression:
$28 + 125 \times 5 - 12 \div 3$

Interchange the operators:

• $+$ becomes $-$
• $-$ becomes $+$
• $\times$ becomes $\div$
• $\div$ becomes $\times$

So the expression becomes:
$28 - 125 \div 5 + 12 \times 3$

Now solve using BODMAS:

$125 \div 5 = 25$
$12 \times 3 = 36$

So,
$28 - 25 + 36 = 3 + 36 = 39$

Final Answer: 39