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## Quiz of the Month (February 2003)

### Hector C. Parr

***

#### SOLUTION TO LAST MONTH'S QUIZ

```     1.  1 Ford
2.  5 or 6 Fords
3.  0 Fords
Notes.
The possible numbers of Fords, consistent with the
by inspection.

A:      1, 2, 3, 4, 5, 6
B:         2, 3, 4, 5, 6
C:   0, 1, 2, 3, 4```

#### THIS MONTH'S QUIZ

1. A canoeist can travel at 5 mph in still water. On one occasion he paddled one mile upstream and back again to his starting point. If the current was flowing at 3 mph, what was his average speed for the two-mile journey?

2. On another occasion he completed the same double journey at an average speed of 3.75 mph. What was the speed of the current that day?

3. On a day when the current flowed at 3 mph, the canoeist needed to paddle across the river to a point on the other bank directly opposite, and back again. What was his average speed for the double journey?

***

(c) Hector C. Parr (2002)

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