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A little while ago I met Smart Joe again. He is a watchmaker now and just had a big success with a watch he invented named the Smartwatch. With the Smartwatch you can't only change between the twelve and twenty-four hour systems. You can change the watch into any system up to twenty-nine.
Solve these problems on the Smartwatch in different systems. You can change the clock's system by clicking on the black buttons. Do the problems always give the same results? The answers always get checked in the system shown by the clock.
