AUGUST 1, 2010
If it takes twice as long for a passenger train to pass a freight train after it first overtakes it as it takes the two trains to pass when going in opposite directions.
How many times faster than the freight train is the passenger train?
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FROM LAST MONTH
AREA OF A SQUARE
You have a piece of paper, 10cm by 10cm. Area = 100cm squared. For some reason, you need a square piece of paper with an area of 50cm squared. Using the paper you have, what's an easy way of getting the new square?
ANSWER Bring each of the four corners to the center of the original square.
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