Clock Arithmetic

We all know how to add numbers, but did you ever think about how strangely we add the hours on a clock? If it is 3 o'clock and we add 5 hours to the time that will put us at 8 o'clock, so we could write 3 + 5 = 8. But if it is 11 o'clock and we add 5 hours the time will be 4 o'clock, so we should write 11 + 5 = 4 !!! Now everyone knows that 11 + 5 is really 16, but there is no 16 on the clock (unl

[withteeth]

時計算術(法算術)