i got this assignment where i need to answer what the time is 550 minutes after 22:15 but the minutes really confuses me.

I got a similar assignment where i had to calculate the time 10000 hours after 16:00 but here i just added the 16 hours to 10000 and looked at at the time 10016 hours after 00 using the residue class [10016]\_24 which got me [8]\_24 .

How can i do it similar on the first assignment?? We need to use residue classes.