GMAT Quantitative Reasoning Practice Test 3

Question : 99 of 100

Marks: +1, -0

The bus that travels from St. Louis to Chicago and back comes to St. Louis every 4 hours while the bus that travels from St. Louis to Springfield and back comes to St. Louis every 6 hours. If at

12:00

o’clock both bused arrived at St. Louis, at what time will they meet in St. Louis again?

$16: 00$
$18: 00$
$20: 00$
$22: 00$
$24: 00$

Validate

Solution:

In order for both buses to meet again, we ought to look for the smallest common factor of 4 and 6, thus 12 hours. After 12 hours one of the buses will complete 3 roundtrips while the other will complete only 2, they will meet at

12:00 + 12 = 24:00.

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