2021 AMC 12A Problems/Problem 16
Contents
[hide]Problem
In the following list of numbers, the integer appears
times in the list for
.
What is the median of the numbers in this list?
Solution
Solution 1
There are numbers in total. Let the median be
. We want to find the median
such that
or
Note that
. Plugging this value in as
gives
, so
is the
nd and
rd numbers, and hence, our desired answer.
.
Solution 2
The th number of this sequence is obviously
via the quadratic formula. We can see that if we halve
we end up getting
. This is approximately the number divided by
.
and since
looks like the only number close to it, it is answer
~Lopkiloinm
Video Solution by Hawk Math
https://www.youtube.com/watch?v=AjQARBvdZ20
Video Solution by pi_is_3.14 (Using Algebra)
See also
2021 AMC 12A (Problems • Answer Key • Resources) | |
Preceded by Problem 15 |
Followed by Problem 17 |
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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