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Source: — Problem Solving |

by selango » Sun Sep 05, 2010 5:21 am
Let the board referred in the question be X.

X is 20th board from the top(ie) there are 19 boards on top of X.

X is below the 16th board counting from the bottom(ie) X is the 15th board from the bottom.There are 14 boards under X.

Number of boards=19+1(X)+14=34
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