PREP里的2道PS题

Q1:

Which of the following lists the number of points at which a circle can intersect a triagle?

A.2,and 6 only

B.2,4,and 6 only

C.1,2,3,and 6 only

D.1,2,3,4,and 6 only

E.1,2,3,4,5, and 6

答案是E,我就没看明白题目是啥意思.

Q2:

A hiker walking at a constant rate of 4 miles per hour is passed by a cyclist traveling in the same direction along the same path at a constant rate of 20 miles per hour. The cyclist stops to wait for the hiker 5 minutes after passing her, while the hiker continues to walk at her constant rate. How many minutes must the cyclist wait until the hiker catch up?

A.20/3

B.15

C.20

D.25

E.80/3

答案是C

1. a circle and a triangle, the number of intersects can be 1,2,3,4,5,6

2. (20-4)/4*5=20

啊，原来是这样～～～做题的时候咋就没看懂捏，晕了～～～

谢谢楼上的！