Page 49 - Arithmetic

6. Two friends run around a circular track. They both start at 9.30 a.m., but in the opposite direction. One friend runs at 5 rounds per hour, and the other runs 7 rounds per hour. How many times will the two friends cross each other before 11.00 a.m.?
a) 6 times b) 12 times c) 15 times d) 18 times e) They will never cross each other
7. Anna travels 120 miles at 40 miles per hour via train, 80 miles at 30 miles per hour via ship, and 500 miles at 300 miles per hour via airplane. What is the average speed for the entire journey?
a) 95 7 miles per hour b) 95 11 miles per hour 11 7
c) 95 5 miles per hour d) 95 11 miles per hour 11 5
e) Cannot be determined
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Arithmetic Concept