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In a lawn, there is a patch of clover. Every week, the patch doubles in size. If it takes 12 weeks for the patch to cover the entire lawn, how long would it take for the patch to cover half of the lawn?

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    11 weeks

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    A bag contains five purple ("P") blocks and one yellow ("Y") blocks. Without looking into the bag you reach in, take out a block, return the block to the bag, and then repeat the same process a number of times. what is the sequences of selected blocks

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