2007 AMC 12A Problems/Problem 14
Problem
Let a, b, c, d, and e be distinct integers such that
What is ?
Solution
If 45 is expressed as a product of five distinct integer factors, the absolute value of the product of any four it as least , so no factor can have an absolute value greater than 5. Thus the factors of the given expression are five of the integers . The product of all six of these is , so the factors are -3, -1, 1, 3, and 5. The corresponding values of a, b, c, d, and e are 9, 7, 5, 3, and 1, and their sum is 25 (C).
See also
2007 AMC 12A (Problems • Answer Key • Resources) | |
Preceded by Problem 13 |
Followed by Problem 15 |
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All AMC 12 Problems and Solutions |