Explanation:

Let's evaluate each option to find the correct interchange:

- Initial Equation: 9 + 6 ÷ 4 - 5 + 3 = 10

- Option 1: Interchange 6 and 10

- New Equation: 9 + 10 ÷ 4 - 5 + 6 = 10

- Calculate: 9 + 2.5 - 5 + 6 = 12.5

- Not equal to 10

- Option 2: Interchange 10 and 5

- New Equation: 9 + 6 ÷ 4 - 10 + 3 = 10

- Calculate: 9 + 1.5 - 10 + 3 = 3.5

- Not equal to 10

- Option 3: Interchange 9 and 3

- New Equation: 3 + 6 ÷ 4 - 5 + 9 = 10

- Calculate: 3 + 1.5 - 5 + 9 = 8.5

- Not equal to 10

- Option 4: Interchange 4 and 3

- New Equation: 9 + 6 ÷ 3 - 5 + 4 = 10

- Calculate: 9 + 2 - 5 + 4 = 10

- Equal to 10

Option 4 is the correct answer.