there are 5 data in the example,each data is formated, you should change it so you can look for avg,med,range

now when they say average does it mean average for every seconds,hour,min ex for min (15+47+17+32+2)/5 so average for min=56.5 but here its 35 (Average: 01|35|15)

No it doesn't mean average for every seconds,hour,min. The average is global.
BTW your calculation "(15+47+17+32+2)/5 so average for min=56.5" seems wrong but here it doesn't matter.
Be sure there are no error in the tests so in your example the average is "01|35|15" which means that on average the team has run in 1h 35mn 15s.

Because 127765 - 6 = 127759

find the sum of all the integers between and including them