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k a April Highlights and 2025 AoPS Online Class Information
jlacosta   0
Apr 2, 2025
Spring is in full swing and summer is right around the corner, what are your plans? At AoPS Online our schedule has new classes starting now through July, so be sure to keep your skills sharp and be prepared for the Fall school year! Check out the schedule of upcoming classes below.

WOOT early bird pricing is in effect, don’t miss out! If you took MathWOOT Level 2 last year, no worries, it is all new problems this year! Our Worldwide Online Olympiad Training program is for high school level competitors. AoPS designed these courses to help our top students get the deep focus they need to succeed in their specific competition goals. Check out the details at this link for all our WOOT programs in math, computer science, chemistry, and physics.

Looking for summer camps in math and language arts? Be sure to check out the video-based summer camps offered at the Virtual Campus that are 2- to 4-weeks in duration. There are middle and high school competition math camps as well as Math Beasts camps that review key topics coupled with fun explorations covering areas such as graph theory (Math Beasts Camp 6), cryptography (Math Beasts Camp 7-8), and topology (Math Beasts Camp 8-9)!

Be sure to mark your calendars for the following events:
[list][*]April 3rd (Webinar), 4pm PT/7:00pm ET, Learning with AoPS: Perspectives from a Parent, Math Camp Instructor, and University Professor
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April 9th (Webinar), 4:00pm PT/7:00pm ET, Learn about Video-based Summer Camps at the Virtual Campus
[*]April 10th (Math Jam), 4:30pm PT/7:30pm ET, 2025 MathILy and MathILy-Er Math Jam: Multibackwards Numbers
[*]April 22nd (Webinar), 4:00pm PT/7:00pm ET, Competitive Programming at AoPS (USACO).[/list]
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0 replies
jlacosta
Apr 2, 2025
0 replies
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real math problems
Soupboy0   52
N 9 minutes ago by Charizard_637
Ill be posting questions once in a while. Here's the first question:

What fraction of numbers from $1$ to $1000$ have the digit $7$ and are divisible by $3$?
52 replies
Soupboy0
Mar 25, 2025
Charizard_637
9 minutes ago
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Website to learn math
hawa   26
N an hour ago by K1mchi_
Hi, I'm kinda curious what website do yall use to learn math, like i dont find any website thats fun to learn math
26 replies
hawa
Apr 9, 2025
K1mchi_
an hour ago
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divisible by 111
aria123   5
N 5 hours ago by aria123
How many 6-digit natural numbers (with distinct digits) can be formed using the digits 2, 3, 4, 5, 6, and 7 that are divisible by 111?
5 replies
aria123
Apr 1, 2025
aria123
5 hours ago
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Hello friends
bibidi_skibidi   5
N Today at 6:39 AM by Leeoz
Now unfortunately I don't know the difficulty of the problems posted here but I'll try to replicate:

Bob has 20 apples and 19 oranges. How many ways can he split the fruits between 7 people if each person must have at least 1 apple and 2 oranges?

After looking at the other posters I realized just how bashy this is

Also I can only edit this message for now since new AoPS users can only send 6 messages every day
5 replies
bibidi_skibidi
Today at 4:04 AM
Leeoz
Today at 6:39 AM
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No more topics!
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max number of candies
orangefronted   5
N Yesterday at 3:23 AM by EthanNg6
A store sells a strawberry flavoured candy for 1 dollar each. The store offers a promo where every 4 candy wrappers can be exchanged for one candy. If there is no limit to how many times you can exchange candy wrappers for candies, what is the maximum number of candies I can obtain with 100 dollars?
5 replies
orangefronted
Apr 3, 2025
EthanNg6
Yesterday at 3:23 AM
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max number of candies
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orangefronted
864 posts
orangefronted
#1 h  Apr 3, 2025, 6:43 AM
Y by
A store sells a strawberry flavoured candy for 1 dollar each. The store offers a promo where every 4 candy wrappers can be exchanged for one candy. If there is no limit to how many times you can exchange candy wrappers for candies, what is the maximum number of candies I can obtain with 100 dollars?
This post has been edited 1 time. Last edited by orangefronted, Apr 3, 2025, 6:44 AM
Reason: typo
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BAM10
89 posts
BAM10
#2 h  Apr 3, 2025, 10:51 AM • 2 Y
Y by Didi_Chua, orangefronted
133. I'm pretty sure
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RollingPanda4616
202 posts
RollingPanda4616
#3 h  Apr 3, 2025, 11:33 AM
Y by
hint
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fruitmonster97
2465 posts
fruitmonster97
#5 h  Apr 3, 2025, 1:24 PM • 2 Y
Y by orangefronted, sangriabeaver5
Buy 100. Trade in 25 4-packs of wrappers for 25 extra candies. Trade in 6 4-packs of wrappers for 6 more candies. We currently have 7 wrappers. Trade 4 in for another candy, and the remaining wrapper, combined with the 3 remaining, yields one more candy.

Our answer is $100+25+6+1+1=\boxed{133}.$
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aops-g5-gethsemanea2
3453 posts
aops-g5-gethsemanea2
#6 h  Apr 4, 2025, 4:05 PM
Y by
orangefronted wrote:
A store sells a strawberry flavoured candy for 1 dollar each. The store offers a promo where every 4 candy wrappers can be exchanged for one candy. If there is no limit to how many times you can exchange candy wrappers for candies, what is the maximum number of candies I can obtain with 100 dollars?

is this from Sipnayan grade school contest this year?
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EthanNg6
3 posts
EthanNg6
#7 h  Yesterday at 3:23 AM • 1 Y
Y by pythagorazz
I think that it is 133
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