2004 AMC 10B Problems/Problem 6
Contents
[hide]Problem
Which of the following numbers is a perfect square?
Solution 1
Using the fact that , we can write:
We see that is a square, and because , and are primes, none of the other four choices are squares.
Solution 2
Notice that is a perfect square (obviously). Also, . Thus, is a perfect square, so the answer is .
See also
2004 AMC 10B (Problems • Answer Key • Resources) | ||
Preceded by Problem 5 |
Followed by Problem 7 | |
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