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SOLVE: CDR style problem quick algebra
ryfighter 3
N
by cheltstudent
It takes 3 people 10 minutes to mow 2 lawns. How many minutes will it take for 2 people to mow 10 lawns? Express your answer in hours as a decimal.
3 replies
Math with Connect4 Boards
Math-lover1 12
N
by Math-lover1
Hi! So I was playing Connect4 with my friends the other day and I wondered: how many "legal" arrangements of Connect4 can be reached at the ending position?
We assume that we do not stop the game when there is a four in a row, and we have 21 red pieces and 21 yellow pieces. We also drop the pieces one by one into a standard 7 by 6 board. We can start the game with any color piece.
https://en.wikipedia.org/wiki/Connect_Four
We assume that we do not stop the game when there is a four in a row, and we have 21 red pieces and 21 yellow pieces. We also drop the pieces one by one into a standard 7 by 6 board. We can start the game with any color piece.
https://en.wikipedia.org/wiki/Connect_Four
However, I quickly saw that 12 replies
Challenge: Make every number to 100 using 4 fours
CJB19 272
N
by bbojy
I've seen this attempted a lot but I want to see if the AoPS community can actually do it. Using ONLY 4 fours and math operations, make as many numbers as you can. Try to go in order. I'll start:
272 replies
The daily problem!
Leeoz 216
N
by kjhgyuio
Every day, I will try to post a new problem for you all to solve! If you want to post a daily problem, you can! :)
Please hide solutions and answers, hints are fine though! :)
Problems usually get harder throughout the week, so Sunday is the easiest and Saturday is the hardest!
Please hide solutions and answers, hints are fine though! :)
Problems usually get harder throughout the week, so Sunday is the easiest and Saturday is the hardest!
and 
intersect at the point 
.
?
,
.
are chosen from 0 to 1. What is the probability that their positive difference is more than 
?
?
families, there are 
children respectively. If a random child from any of the families is chosen, what is the probability that the child has 
siblings? Express your answer as a common fraction.[/quote]
,
people, exactly 
such that 
.
,
lies on diagonal 
such that 
.
.
has 
,
,
.
.
216 replies
Overly wordy problems
ZMB038 11
N
by Yiyj
Hey everyone, here we can post questions with way to many extraneous words, that are actually easy.
Try to solve the one above yours.
I'll start:
Try to solve the one above yours.
I'll start:
!
candy bars. Let N & M be positive integers, what is N+M?11 replies
Find the amount of possible values from the expression
Darealzolt 3
N
by Justbrick
Find the amount of possible values from
![\[
\frac{|a|}{a}+\frac{|b|}{b}+\frac{|c|}{c}
\]](//latex.artofproblemsolving.com/8/4/a/84a1a990f8bbde7670e9154dd9a46bb18c14d547.png)
For all non zero integers 
![\[
\frac{|a|}{a}+\frac{|b|}{b}+\frac{|c|}{c}
\]](http://latex.artofproblemsolving.com/8/4/a/84a1a990f8bbde7670e9154dd9a46bb18c14d547.png)
For all non zero integers 
3 replies
,![\[ \textbf{(A)}\ 24 \qquad
\textbf{(B)}\ 30 \qquad
\textbf{(C)}\ 46 \qquad
\textbf{(D)}\ 66 \qquad
\textbf{(E)}\ 74
\]](http://latex.artofproblemsolving.com/8/2/f/82ffc15072ca99f6cd1abc312781eb4827817356.png)
2500th Post!
PikaPika999 21
N
by PikaPika999
I may be a bit late for this, but this is my 2500th post :)
Also this is going to be my last one until another big milestone bc I don't wanna clog up the MSM forum with my milestones
Also, since my 1000th post math story was locked due to a flamewar, here is my math story with a few updates :)
(This was also scripted so if there are any problems in my story, um... well, it is what it is)
Script starts:
When I had less than 25 posts on AoPS, I saw many people create threads about them getting 1000th posts and their math story. I thought I would never hit 1000 posts, but I did, and that thread
So, here we are, :)
In conclusion, AoPS has helped me improve my math.
Finally, I would like to say thank you to all the new friends I made and all the instructors on AoPS that taught me!
and here are some problems ig :)
hopefully these problems weren't too easy lol
Also this is going to be my last one until another big milestone bc I don't wanna clog up the MSM forum with my milestones
Also, since my 1000th post math story was locked due to a flamewar, here is my math story with a few updates :)
(This was also scripted so if there are any problems in my story, um... well, it is what it is)
Script starts:
When I had less than 25 posts on AoPS, I saw many people create threads about them getting 1000th posts and their math story. I thought I would never hit 1000 posts, but I did, and that thread
So, here we are, :)
In conclusion, AoPS has helped me improve my math.
Finally, I would like to say thank you to all the new friends I made and all the instructors on AoPS that taught me!
and here are some problems ig :)
is not a prime number.
and 
be two points in the coordinate plane. A circle is drawn such that 
is a diameter.
.hopefully these problems weren't too easy lol
21 replies
9 Favorite topic
A7456321 33
N
by A7456321
What is your favorite math topic/subject?
If you don't know why you are here, go binge watch something!
If you forgot why you are here, go to a hospital! :)
If you know why you are here and have voted, maybe say why you picked the option that you picked in a response) :thumbup:
if ur here for any reason whatsoever,
If you don't know why you are here, go binge watch something!
If you forgot why you are here, go to a hospital! :)
If you know why you are here and have voted, maybe say why you picked the option that you picked in a response) :thumbup:
if ur here for any reason whatsoever,
33 replies
