2019 CIME I Problems/Problem 11
We define a positive integer to be multiplicative if it can be written as the sum of three distinct positive integers such that is a multiple of and is a multiple of . Find the sum of all the positive integers which are not multiplicative.
Solution 1
The positive integers which are not multiplicative are . These sum to .
See also
2019 CIME I (Problems • Answer Key • Resources) | ||
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Followed by Problem 12 | |
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