how can I divide a clock into 4 sections & each section add up to be same sum?

Answer 1

If you're talking about hours, it won't work because the numbers from 1 to 12 add to 78, which isn't divisible by 4 evenly.

If you're talking about minutes, you can do it. The sum of 1 to 60 is 31*60, which when divided by 4 is 165.

Now you need to find 4 segments that each add to 165. One such segment is 54,55,56. Another is 31,32,33,34,35. A third is the eleven numbers centered on 15: 10 to 20. That would leave all the remaining numbers as the fourth segment. You can see how to divide the face of a clock to include the three listed segments and leave everything else.

Answer 2

No. You can only cut it into halves, each counting 39.