6.49 is greater than 6 but less than 7, which means the first answer is correct.
It is also greater than 6.48 but less than 6.50, which means that the second answer is also correct.
It is not greater than 6.59, which means it would be to the left of 6.59, the third option is not correct.
It is greater than 6.4 and less than 6.5, the last option is correct too.
All answers are correct, except for the third option.