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If each of the sides of a square is lengthened by 6cm, the area becomes 144cm2. Find the length of a side of the original square.
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Andrea has 7 teddy bears in a row on a shelf in her room. How many ways can she arrange the bears in a rowon her shelf.
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Andrea has 7 teddy bears in a row on a shelf in her room.  How many ways can she arrange the bears in a row on her shelf?

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