Conference Ticket Advance Discounts
5-29 days in advance -> 15%
30-59 days in advance -> 30%
60-89 days in advance -> 40%
Helen bought a ticket for $252. If she had bought it 1 day later, she would have paid $306. How many days in advance did she buy her ticket?

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Official Explanation

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Let's say the regular ticket price is $100 and see what kinds of prices we pay.

5-29 days in advance: we pay $85

30-59 days in advance: we pay $70

60-89 days in advance: we pay $60

Now let's examine the following ratios:

(\text{Price paid 30-59 days in advance})/(\text{Price paid 5-29 days in advance}) = 70/85 = 14/17

(\text{Price paid 60-89 days in advance})/(\text{Price paid 30-59 days in advance}) = 60/70 = 6/7

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What this question tests

What it tests

Your ability to apply GMAT math concepts to solve a multi-step problem quickly and accurately. At the 705-805 level, accuracy and speed both matter.

Common trap

Overcomplicating the setup — most GMAT problems reward a direct, organized approach over brute calculation.

Conference Ticket Advance Discounts5-29 days in advance -> 15%30-59 days in advance -> 30%60-89 days in advance -> 40%Helen bought a ticket for $252. If she had bought it 1 day later, she would have paid $306. How many days in advance did she buy her ticket?