Difference between revisions of "2021 JMPSC Accuracy Problems/Problem 5"
(→Solution) |
|||
| Line 10: | Line 10: | ||
~Bradygho | ~Bradygho | ||
| + | |||
| + | |||
| + | |||
| + | ==See also== | ||
| + | #[[2021 JMPSC Accuracy Problems|Other 2021 JMPSC Sprint Problems]] | ||
| + | #[[2021 JMPSC Accuracy Answer Key|2021 JMPSC Sprint Answer Key]] | ||
| + | #[[JMPSC Problems and Solutions|All JMPSC Problems and Solutions]] | ||
| + | {{JMPSC Notice}} | ||
Revision as of 16:21, 11 July 2021
Problem
Let 
for all positive integers 
. Find the value of 
that satisfies ![\[\frac{5!x}{2022!}=\frac{20}{2021!}.\]](http://latex.artofproblemsolving.com/3/6/d/36df42c0f356e92ee3bcdca3abaa75bc4387fd5b.png)
Solution
We can multiply both sides by 
to get rid of the fractions
![\[\frac{5!x}{2022!}=\frac{20}{2021!}\]](http://latex.artofproblemsolving.com/7/1/1/7114489da9030ac2d999a4d742a8e91407d403bf.png)
![\[5!x=20 \cdot 2022\]](http://latex.artofproblemsolving.com/9/6/7/967dbc66c5ba348bdd938e31f827dc2865ae7b1d.png)
![\[120x=(120)(337)\]](http://latex.artofproblemsolving.com/3/5/9/359eb00ab26bc2d6cc37b3b005f10182af28b227.png)
![\[x=\boxed{337}\]](http://latex.artofproblemsolving.com/2/4/e/24ef932a425a2d016c919c1057a06b618db6bbf1.png)
~Bradygho
See also
The problems on this page are copyrighted by the Junior Mathematicians' Problem Solving Competition. 
