Seb’s watch gains 5 seconds every 3 hours, whereas Lewis’ watch loses 10 seconds every 2 hours.

Seb’s watch gains 5 seconds every 3 hours, whereas Lewis’ watch loses 10 seconds every 2 hours. If both watches are set to the correct time at 1 a.m. Sunday, then at what earliest time they will have a difference of 9 minutes among them?

A. 7 a.m. Wednesday
B. 10 a.m. Wednesday
C. 7 p.m. Wednesday
D. 10 p.m. Wednesday
E. 7 a.m. Thursday

Answer: B

Source: e-GMAT

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