दिए गए दो संख्याओं (अंकों को नहीं) को आपस में बदलने पर, निम्नलिखित में से कौन सा समीकरण सही नहीं होगा? बदलने वाली संख्याएँ: 9 और 7 I. 9 × 2 + 7 - 6 ÷ 3 = 21 II. 7 × 3 + 9 - 8 ÷ 2 = 30

What will come in place of the question mark (?) in the following equation, if '+' and '-' are interchanged and '×' and '÷' are interchanged? 37 ÷ 5 - 91 + 16 × 4 = ?

If '+' and '-' are interchanged, and '×' and '÷' are interchanged, then what will come in place of the question mark (?) in the following equation? 26 ÷ 676 × 156 - 69 + 83 = ?