Difference between revisions of "2016 AMC 10A Problems/Problem 1"
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<math>\dfrac{10^2}{1}</math> | <math>\dfrac{10^2}{1}</math> | ||
− | answer is 10^2 which is 100 | + | answer is <math>10^2</math> which is 100 |
+ | |||
+ | ==Solution 4== | ||
+ | We are given the equation <math>\frac{11!-10!}{9!}</math> | ||
+ | |||
+ | This is equivalent to <math>\frac{11(10!) - 1(10!)}{9!}</math> | ||
+ | Simplifying, we get <math>\frac{(11-1)(10!)}{9!}</math>, which equals <math>10 \cdot 10</math>. | ||
+ | |||
+ | Therefore, the answer is <math>10^2</math> = <math>\boxed{\textbf{(B)}~100}</math>. | ||
+ | |||
+ | ~TheGoldenRetriever | ||
+ | |||
+ | ==Video Solution (HOW TO THINK CREATIVELY!!!)== | ||
+ | https://youtu.be/r5G98oPPyNM | ||
+ | |||
+ | ~Education, the Study of Everything | ||
+ | |||
+ | |||
==Video Solution== | ==Video Solution== | ||
https://youtu.be/VIt6LnkV4_w | https://youtu.be/VIt6LnkV4_w | ||
− | |||
https://youtu.be/CrS7oHDrvP8 | https://youtu.be/CrS7oHDrvP8 | ||
~savannahsolver | ~savannahsolver | ||
+ | |||
+ | ==Video Solution (FASTEST METHOD!)== | ||
+ | |||
+ | https://youtu.be/jowREGsZaTs | ||
+ | |||
+ | ~Veer Mahajan | ||
+ | |||
==See Also== | ==See Also== |
Latest revision as of 22:59, 1 November 2023
Contents
Problem
What is the value of ?
Solution 1
We can use subtraction of fractions to get
Solution 2
Factoring out gives
.
Solution 3
consider 10 as n
simpify
=
=
=
=
subsitute n as 10 again
answer is which is 100
Solution 4
We are given the equation
This is equivalent to
Simplifying, we get
, which equals
.
Therefore, the answer is =
.
~TheGoldenRetriever
Video Solution (HOW TO THINK CREATIVELY!!!)
https://youtu.be/r5G98oPPyNM
~Education, the Study of Everything
Video Solution
~savannahsolver
Video Solution (FASTEST METHOD!)
~Veer Mahajan
See Also
2016 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 |
2016 AMC 12A (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 12 Problems and Solutions |
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