Difference between revisions of "2016 AMC 10A Problems/Problem 6"
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Education, the Study of Education. | Education, the Study of Education. | ||
Revision as of 22:03, 1 February 2021
Video Solution
https://youtu.be/qrgPsA9AQLA. (short and simple!)
Education, the Study of Education.
Problem
Ximena lists the whole numbers 
through 
once. Emilio copies Ximena's numbers, replacing each occurrence of the digit 
by the digit . Ximena adds her numbers and Emilio adds his numbers. How much larger is Ximena's sum than Emilio's?
Solution
For every tens digit 2, we subtract 10, and for every units digit 2, we subtract 1. Because 2 appears 10 times as a tens digit and 2 appears 3 times as a units digit, the answer is 
Video Solution
~IceMatrix
~savannahsolver
See Also
| 2016 AMC 10A (Problems • Answer Key • Resources) | ||
| Preceded by Problem 5 |
Followed by Problem 7 | |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | ||
| All AMC 10 Problems and Solutions | ||
The problems on this page are copyrighted by the Mathematical Association of America's American Mathematics Competitions. 
