Bunuel wrote:

If it took a bus three hours to get from town A to town B, what was the average speed of the bus for the entire trip?

(1) During the first hour the bus finished \(\frac{1}{3}\) of the distance at an average speed of 60 kilometers per hour.

(2) During the second hour the average speed of the bus was 80 kilometers per hour, twice its speed during the third hour.

What a great question! It would be so easy to pick C thinking that you need stmt 2 to finish the math regarding stmt 1. But stmt 1 tells you that you are 1/3 of the way through after an hour at 60km. So we have to go 120 km in 2 hours or 180km in 3 hours, we have all we need for the average speed formula.

This question isn't a 700 because the math is difficult or niche, but because it is tricky.

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Gmat prep 1 600

Veritas 1 650

Veritas 2 680

Gmat prep 2 690 (48Q 37V)

Gmat prep 5 730 (47Q 42V)

Gmat prep 6 720 (48Q 41V)