GMAT Data Sufficiency Practice Questions

In a city's subway system, Line A and Line B each operate using multiple trains. Did Line A carry at least 1000 more passengers than Line B on a particular day?

A company employs full-time and part-time staff. It will give a bonus to every full-time employee and to some of the part-time employees. Will the total bonus payout exceed $10,000?

A regional transportation agency tracked usage of a pedestrian bridge in the city center. On one weekday the agency surveyed every pedestrian who used the bridge that day. Each surveyed pedestrian answered yes or no to each of two questions: Did you cross the bridge before 8:00 a.m.? Did you cross the bridge more than once that day? Every surveyed pedestrian answered both questions.

The number of pedestrians surveyed, N, is a positive integer. The number of surveyed pedestrians who answered yes to both questions, x, is also a positive integer.

Does x have more than 2 distinct prime factors?

On a cattle drive, a crew moves a drove to a far pasture in five stages. A lead rider starts with the drove, and at the end of each stage the drove is halted for a rest interval while one tired rider leaves and a relief rider takes over for the next stage. The lengths of the five rest intervals form an arithmetic sequence: each interval after the first differs from the interval before it by the same fixed number of minutes. Every rest interval lasts a positive number of minutes.

What is the total number of minutes the drove spends at rest over the five intervals?

In a construction project, two types of beams were used. Type A beams cost 4 dollars per foot and type B beams cost 6 dollars per foot. The lengths used for both types are positive integers. Did the project use more feet of type A beams than type B beams?

At an early sawmill, 60 blades were surveyed for two yes or no features: F, the blade was sharpened before the first bell, and H, the blade was then set for hardwood. For the blades with both F and H, the sharpening intervals, in hours, are distinct positive integers and have a mean of 12 hours. What is the longest sharpening interval among the blades with both F and H?

A straight fence is made of adjacent gaps, with one post at each end of every gap and with adjacent gaps sharing the post between them, so a fence with G gaps uses G + 1 posts. Every gap is either a short gap of 4 meters or a long gap of 6 meters, and both types occur. The numbers of short gaps and long gaps are positive integers. A drilling contractor charges a flat fee of $480 for a job if the number of holes drilled is at most 40. If the number of holes drilled is greater than 40, the contractor charges $480 for the first 40 holes and, for each additional hole, a rate that is 25% greater than the per hole rate implied by the flat fee for exactly 40 holes. What is the total length of the fence, in meters?

A testing lab checks the flex ratings of pole vault poles in two batches, Batch A and Batch B. Each batch contains only standard poles and extended poles, and each batch has at least one pole of each type. All pole counts are whole numbers. In each batch, the standard poles tested have mean flex rating 12 and the extended poles tested have mean flex rating 21. For each batch separately, the testing charge is $120 if at most 8 poles are tested, and if more than 8 poles are tested the charge is $120 plus $15 for each pole beyond 8. There are no other charges. Let a be the ratio of the number of standard poles to the number of extended poles in Batch A, and let b be that ratio in Batch B. Is a greater than b?

At a mosaic workshop, a morning crew and an afternoon crew sort decorative tiles, and every tile is sorted by exactly one crew. The morning crew sorts each tile in an average of 2 minutes, and the afternoon crew sorts each tile in an average of 5 minutes. The afternoon crew left partway through the day, and the morning crew sorted all of the tiles that remained. Yesterday the two crews sorted a total of at least 56 and at most 66 tiles, each crew sorted a positive whole number of tiles, and the afternoon crew sorted fewer than 30 tiles. Did the morning crew sort more than twice as many tiles as the afternoon crew?