Answer:
61
Step-by-step explanation:
* odd numbers are those that can't be divided into pairs-1, 3, 5, 7, or 9
* bigger than 50 and smaller than 100-so one number between 60 and 90
* digits add up to 7-so we have left 52, 61, and 70, but as the odd number is asked, then we are sure it is 61.
