book Maths Puzzle Numerical Ability

Could someone out there help me solve this problem?

Add:
3 h 20 min
4 h 25 min
+ 5 h 35 min

Thanks,
Sher

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book Other Question

find the exact value of cos 105 degrees WITHOUT USING TABLES OR A CALCULATOR. be sure to show your work. USE THE FORMULA FOR COMBINATIONS TO SOLVE THE FOLLOWING PROBLEM. PLEASE SHOW WORK.</b>

A locker contains 8 books. You select 3 books at random. How many different sets of books could you select?

Thank you for your brain power!</b>