Which number lies strictly between 0.72 and 0.73?

Explanation

The value 0.725 is greater than 0.720 and less than 0.730, so it lies strictly inside the interval. The value 0.75 is larger than the upper endpoint, an error caused by comparing only the number of digits. The nearest wrong option is 0.730: it is not strictly between the bounds because it equals the upper endpoint 0.73 itself.