A train display shows letters by lighting cells in a grid, such as the letter ‘o’ shown. A letter is made bold by also lighting any unlit cell immediately to the right of one in the normal letter. How many cells are lit in a bold ‘o’?
Select one option, then click Submit.
22
24
26
28
30
Select an option, then submit.
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Junior Mathematical Challenge 2011 (2011)
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