Given equation: 4 + 2 ÷ 3 × 8 - 1 = 6 We have to interchanged any two numbers then check the option: 1) 3 and 4, 3 + 2 ÷ 4 × 8 - 1 = 6 = 3 + 4 - 1 = 6 = 7 - 1 = 6 = 6 = 6. Option 1 is correct. So, no need to check the other option. Thus, the correct answer is “3 and 4”.