Correct Answer: 64 – 36

Solution : Let's check the options –

First option: 64 – 36; Both 64 and 36 are even numbers as they are divisible by 2.
Second option: 75 – 35; Both 75 and 35 are not even numbers as they are not divisible by 2.
Third option: 57 – 43; Both 57 and 43 are not even numbers as they are not divisible by 2.
Fourth option: 39 – 61; Both 39 and 61 are not even numbers as they are not divisible by 2.

So, the first option is different from the other three options as here both 64 and 36 are even numbers. Hence, the first option is correct.