Im at that confused age I find the 24hr clock easier as I've worked with it for 35yrs in the rail industry , I find kilometers easier to visualise than miles but I still try to convert mm ,cm & metres into ins, ft. & yards to visualise the measurement I was raised with pounds, shillings & pence , 12 pence to the shilling , 20 shillings to the pound , dont even think about the florins , quienies , crowns , 1/2 crowns & farthings :confused: :confused: What a waste of school time trying to knock all that now useless information into our thick heads .You people in the US have had metric money for **********, a long time anyway . In the last 10yrs I've started thinking in litres & kilograms instead of pints , gallons, pounds ,ounces ect.
How about a metric clock 10 secs to the min. 10 mins to the hr, 10 hrs to the day but then we would need milleseconds & centiseconds too ! 10 months to the year ect. The mind boggles