This seems like a fairly simple question--unless I am overlooking something. Clock a should cover 24 hours accurately between 6 p.m. one day and 6 p.m. the next day. If Clock b is losing 2 minutes every hour, then it should have lost 2 times 24 minutes in that time period, or 48 minutes. Since there are 60 minutes in an hour, Clock b should be showing 6 p.m. minus 48 minutes, which would mean that it would be showing 5:12 p.m. the next day when Clock a is showing 6 p.m. Clock b would show 6:58 after the first hour of the first day, 7:56 after the second hour of the first day, and so on.