Activity I am an odd number. My digits add up to 7. I am bigger than 50 and smaller
than 100. Who am I?

explain for me my dear

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.