Given the diagram of boxes below, determine, in the fastest possible way, the area of the dark blue region.
Assume the individual boxes to be 1 unit square in area.
Give your answer in the comment space, please.
Maths does not involve plain counting.
It involves some form of intelligence to get things going.
:-)
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4 comments:
52
8 by 8 minus 5 = 59.
Although i wonder if the white line at the top was made by purpose.
7 x 8 = 56
56 - 4 = 52 unit sq.
if those boxes above the line arent included:
7 x 7 = 49
49 - 4 = 45 unit sq.
sam got it correct.
You may use the replacement technique to cover the white space with similarly shaped blue areas.
In this case, 4 white boxes are exposed.
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