book Maths Puzzle Numerical Ability

a child must be 50 in tall to ride on a roller coaster . how would I determine how to find this answer?

H > 50

H > 50
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H < 50

H < 50
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book Other Question

A mixture of 30 lbs. of candy sells for $1.10 a pound. The mixture consists of chocolates worth $1.50 a pound and chocolates worth 90� a pound. How many pounds of each kind were used to make the mixture? a local train leaves newark at 8:00am and travels west at an average speed at 40 mi/hr. At 9;00 am an express train leaves Newark on tracks parrallel to the local train and heads