alleryStart learning →A 5 x 3 grid has 8 white and 7 black squares. Removing which square makes it tileable by 2 x 1 tiles?
AA black one
BEither colour
CA white one
DNeither colour
Answer & Solution
Correct answer: C. A white one
Every tile covers one white and one black square, so the left-over region needs equal counts, and removing a white square gives 7 and 7.
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