2018 AMC 8 Problems/Problem 7
Problem 7
The -digit number is divisible by . What is the remainder when this number is divided by ?
Solution
We use the property that the digits of a number must sum to a multiple of if it are divisible by . This means must be divisible by . The only possible value for then must be . Since we are looking for the remainder when divided by , we can ignore the thousands. The remainder when is divided by is
2018 AMC 8 (Problems • Answer Key • Resources) | ||
Preceded by Problem 6 |
Followed by Problem 8 | |
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