[JMC 2007 Q11] A station clock shows each digit by illuminating up to seven bars in a display. For example, the displays for 1, 6, 4 and 9 are shown. When all the digits from 0 to 9 are shown in turn, which bar is used least?
Select one option, then click Submit.
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Select an option, then submit.
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Junior Mathematical Challenge 2007 (2007)
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