POW – April 21, 2008 Name ________________________
Option 1: The numbers 1 and 9 are two of five counting numbers that produce a sum of 25. Those same five numbers, when multiplied, give a product of 945. What are the other three numbers?
Option 2: A new operation symbol has been created in mathematics. Your task is to determine how the @ operation works. Based on the equations below, what would 7 @ 8 equal?
1 @ 2 = 5
3 @ 4 = 25
4 @ 5 = 41
5 @ 6 = 61
7 @ 8 = ____
Option 3: In 1980, a typical telephone number in the United States contained seven digits. Several areas of the country now must use ten-digit telephone numbers. If the entire country follows, exactly how many different ten-digit telephone numbers are available such that the first digit cannot be a 0 or 1 and the fourth cannot be a 0?
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