By interchanging which two signs and two numbers (not digits) the equation will be correct?
7 × 5 ÷ 6 + 2 – 4 = 16

Correct option is D

Given: 7 × 5 ÷ 6 + 2 – 4 = 16
(a) × and ÷, 2 and 4 after interchanging we get followng equation-
7 ÷ 5 × 6 + 4 – 2 = 16
Follow the BODMAS rule:
1. Divide (÷) 1.4 × 6 + 4 – 2 = 16
2. Multiply (×) 8.4 + 4 – 2 = 16
3. Addition (+) 12.4 – 2 = 16
4. Subtract (-) 10.4 ≠ 16.
(b) × and - , 5 and 6 after interchanging we get followng equation-
7 - 6 ÷ 5 + 2 × 4 = 16
Follow the BODMAS rule:
1. Divide (÷) 7 – 1.2 + 2 × 4 = 16
2. Multiply (×) 7 – 1.2 + 8 = 16
3. Addition (+) 15 – 1.2 = 16
4. Subtract (-) 13.8 ≠ 16.
(c) + and -, 6 and 2 after interchanging we get followng equation-
7 × 5 ÷ 2 - 6 + 4 = 16
Follow the BODMAS rule:
1. Divide (÷) 7 × 2.5 - 6 + 4 = 16
2. Multiply (×) 17.5 - 6 + 4 = 16
3. Addition (+) 21.5 - 6 = 16
4. Subtract (-) 15.5 ≠ 16.
(d) ÷ and +, 7 and 4 after interchanging we get followng equation-
4 × 5 + 6 ÷ 2 – 7 = 16
Follow the BODMAS rule:
1. Divide (÷) 4 × 5 + 3 – 7 = 16
2. Multiply (×) 20 + 3 – 7 = 16
3. Addition (+) 23 – 7 = 16
4. Subtract (-) 16 =16.
Correct answer is (d).