Difference between revisions of "2021 AMC 10A Problems/Problem 1"
Duoduoling0 (talk | contribs) (You can just directly calculate the equation.) |
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\end{align*}</cmath> | \end{align*}</cmath> | ||
~MRENTHUSIASM | ~MRENTHUSIASM | ||
+ | ==Solution 3== | ||
+ | You can just directly calculate them. Simplifying <cmath>(2^2-2)-(3^2-3)+(4^2-4),</cmath> we get <cmath>(4-2)-(9-3)+(16-4),</cmath> which simplifies to <cmath>2-6+12=8,</cmath> so the answer is <math>\boxed{\textbf{(D)}8}.</math> | ||
+ | |||
+ | ~DuoDuoling0 | ||
==Video Solution #0(Very Very Quick Computation) == | ==Video Solution #0(Very Very Quick Computation) == |
Revision as of 20:42, 15 February 2021
Contents
[hide]Problem
What is the value of
Solution
This corresponds to
-happykeeper
Solution 2
~MRENTHUSIASM
Solution 3
You can just directly calculate them. Simplifying we get which simplifies to so the answer is
~DuoDuoling0
Video Solution #0(Very Very Quick Computation)
https://www.youtube.com/watch?v=m0_UMI2mnZs&list=PLexHyfQ8DMuKqltG3cHT7Di4jhVl6L4YJ&index=2 ~North America Mathematic Contest Go Go Go
Video Solution #1(Quick Computation)
https://youtu.be/C3n2hgBhyXc?t=37 ~ThePuzzlr
Video Solution (Arithmetic Computation)
~ pi_is_3.14
Video Solution (Simple)
Education, the Study of everything
Video Solution 5
~savannahsolver
See Also
2021 AMC 10A (Problems • Answer Key • Resources) | ||
Preceded by First Problem |
Followed by Problem 2 | |
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.