In this case how many time intervals can Sid calculate?
Bus123456789101112131415Time(hr:min)8:158:188:238:298:328:408:458:528:549:009:079:139:209:259:32
The first bus timing Sid noted was at 8:15. He is unaware when the previous bus came. So, he can only calculate the time interval for the next 14 buses.