2011 AMC 8 Problems/Problem 22
Problem
What is the tens digit of ?
Solution 1
Since we want the tens digit, we can find the last two digits of . We can do this by using modular arithmetic. We can write as . Using this, we can say: From the above, we can conclude that the last two digits of are 43. Since they have asked us to find the tens digit, our answer is .
-Ilovefruits
Video Solution by OmegaLearn
https://youtu.be/7an5wU9Q5hk?t=1710
Video Solution
https://youtu.be/lxtYmUzQQ8w ~David
See Also
2011 AMC 8 (Problems • Answer Key • Resources) | ||
Preceded by Problem 21 |
Followed by Problem 23 | |
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All AJHSME/AMC 8 Problems and Solutions |
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