The Broken Clock

Team: 
The Spicy Lemons
Topic: General Math
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Tick Tock! It is 10:30, Hojin is hungry and needs to know how many minutes there are until lunch. Help Hojin and his classmates figure out how much longer until lunch!

Common Core Standards: SMP
Problem #: 
21 (2011-2012)
Problem Difficulty Level: 2 [?]