well, say the one runs every midnight on a sunday, then all crons would run at the same time, as it's sunday (00:00), it's midnight(00:00), it's one hour(00:00) (one hour crons usually run on every new hour) and it's 5 minutes(00:00) (5 min crons run every 05, 10, 15 ...... 55, 00).
Then when...