Wednesday, 24 February 2010

Math Challenge 22

*
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.

:-)

.
at

4 comments:

  1. Anonymous15 December 2010 at 1:22 am

    52

    ReplyDelete
  2. M29 January 2011 at 2:48 am

    8 by 8 minus 5 = 59.
    Although i wonder if the white line at the top was made by purpose.

    ReplyDelete
  3. sam8 February 2011 at 10:05 pm

    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.

    ReplyDelete
  4. EeHai8 February 2011 at 10:56 pm

    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.

    ReplyDelete