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Camille placed blocks on a table in rows and columns. All the rows and columns had the same

number of blocks in them and formed a square. Which could be the total number of blocks

Camille placed on the table?

A111 blocks
B121 blocks
C181 blocks
D222 blocks

Verified Answer :

AL2006

If all the rows and columns have the some number of blocks, then

(number of blocks in each row) times (number of blocks in each column)

must be a perfect square.

'121' is the only choice on the list that's a perfect square.  It's the square of 11.

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