Which of the following interchanges of numbers would make the given equation correct?
2 × 10 ÷ 8 + 6 – 4 = 9

2 × 10 ÷ 8 + 6 - 4 = 9

Let's check all the options

A) 2, 8

Apply the changes

=> 8 ×10 ÷ 2+ 6 - 4 = 9

Use BODMAS rule

=> 8 × 5+ 6 - 4 = 9

=> 40 + 6- 4 = 9

=>46 - 4= 9

=> 42 = 9, false

B) 6, 8

Apply the changes

=> 2 ×10 ÷ 6+ 8 - 4 = 9

Use BODMAS rule

=> 2 × 1.66 + 8 - 4 = 9

=> 3.33 + 8- 4 = 9

=> 11.33 - 4= 9

=> 7.33 = 9, false

C) 9,10

Apply the changes

=> 2 ×9 ÷ 8+ 6 - 4 = 10

Use BODMAS rule

=> 2 × 1.125+ 6 - 4 = 10

=> 2.25 + 6- 4 = 10

=> 8.25 - 4= 10

=> 4.25 = 10, false

Apply the changes

=> 4 ×10 ÷ 8+ 6 - 2 = 9

Use BODMAS rule

=> 4 × 1.25+ 6 - 2 = 9

=>5 + 6- 2= 9

=>11- 2 = 9

So, the numbers 2, 4 are interchanged to get the correct answer. 

Hence, the correct answer is (d).