2016 AMC 8 Problem 11
Below is the video solution and professionally curated solution for Problem 11 of the 2016 AMC 8, from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 2016 AMC 8 solutions, or check the answer key.
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Difficulty rating: 1100
11.
Determine how many two-digit numbers satisfy the following property:
When the number is added to the number obtained by reversing its digits, the sum is
Video solution:
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Written solution:
Let be the two-digit number in question. Then, it follows that the number obtained by reversing its digits is Therefore, in order for to satisfy the property in the question: The only possible solutions to this equation, where are both one digit, are: As such, there are solutions.
Thus, B is the correct answer.
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