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Brain teaser

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1442:
sort of a formerlar
A=1/2"
B- has that same half inch in its center plus two unknown dimensions. One on each side of the half inch center 
total width is 1-3/4"

So 1-3/4" - (2X1/2") = 3/4"
Three equal spaces are needed besides the (2) 1/2" spaces so divide the remaining  3/4" by 3 which = 1/4"

conclusion
A= 1/2"
b= 1/2" + 1/4" + 1/4"
1/4"= distance from edge of board to A

DC:
Good logical thinking. I wonder why I couldn't do that ;D

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