2018 AMC 10B Problems/Problem 13
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Contents
Problem
How many of the first numbers in the sequence are divisible by ?
Solution
Note that for some odd will suffice . Each , so the answer is (AOPS12142015)
Solution 2
If we divide each number by , we see a pattern occuring in every 4 numbers. 2018450422\boxed{\textbf{(C) } 505}$.
See Also
2018 AMC 10B (Problems • Answer Key • Resources) | ||
Preceded by Problem 12 |
Followed by Problem 14 | |
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