GRE Problem Solving Explanation

Test 10

1. Courier charges for packages to a certain destination are 65 cents for the first 250 grams and 10 cents for each additional 100 grams or part thereof. What could be the weight in grams of a package for which the charge is $1.55 ?

A. 1155
B. 1145
C. 1040
D. 950
E. 259

Correct Answer: B

Explanation:

The weight will be 250g plus (1.55 - 0.65)/0.10 units of 100g
250 + 900 = 1150
This is the maximum weight that can be sent at that price. But, weights exceeding
250 + 800 will also get charged this amount (that is what the ‘part thereof’ implies).
Hence a package weighing 1145 (ans. B) will be charged $1.55

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