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Problem Num : 41 Type: Topic:Number  Theme:None Adjustment# : 43 Difficulty: 1
Category	Fraction
Analysis	You need variables to calculuate the total work.
Solution/Hint

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Problem Num : 42 Type: Topic:Number  Theme:None Adjustment# : 44 Difficulty: 1
Category	Fraction
Analysis	Express your idea 1/2 + 1/2*1/2 +1/2 *1/2*1/2 +1/2 *1/2 *1/2*1/2
Solution/Hint

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